build: various warning fixes

This patch fixes various warnings produced during the build the most
common warning, is the truncation of "size_t" (usually unsigned long) to
(int).  This patch explicitly casts the result to "int" in these cases
to supress the warning.  Additionally, this patch includes a fix to an
internal library load function to take a "const char *" parameter
instead of a "char *" parameter.
Signed-off-by: Keith Holman <keith.holman@windriver.com>

src/MQTTVersion.c

@@ -60,7 +60,7 @@
 
 char* FindString(char* filename, const char* eyecatcher_input);
 int printVersionInfo(MQTTAsync_nameValue* info);
-int loadandcall(char* libname);
+int loadandcall(const char* libname);
 void printEyecatchers(char* filename);
 
 
@@ -133,16 +133,14 @@ int printVersionInfo(MQTTAsync_nameValue* info)
 
 typedef MQTTAsync_nameValue* (*func_type)(void);
 
-int loadandcall(char* libname)
+int loadandcall(const char* libname)
 {
 	int rc = 0;
 	MQTTAsync_nameValue* (*func_address)(void) = NULL;
 #if defined(WIN32) || defined(WIN64)
-	wchar_t wlibname[30];
 	HMODULE APILibrary;
 
-	mbstowcs(wlibname, libname, strlen(libname) + 1);
-	if ((APILibrary = LoadLibrary(wlibname)) == NULL)
+	if ((APILibrary = LoadLibraryA(libname)) == NULL)
 		printf("Error loading library %s, error code %d\n", libname, GetLastError());
 	else
 	{

src/samples/MQTTAsync_publish.c

@@ -106,7 +106,7 @@ void onConnect(void* context, MQTTAsync_successData* response)
 	opts.context = client;
 
 	pubmsg.payload = PAYLOAD;
-	pubmsg.payloadlen = strlen(PAYLOAD);
+	pubmsg.payloadlen = (int)strlen(PAYLOAD);
 	pubmsg.qos = QOS;
 	pubmsg.retained = 0;
 	deliveredtoken = 0;

src/samples/MQTTClient_publish.c

@@ -45,7 +45,7 @@ int main(int argc, char* argv[])
         exit(EXIT_FAILURE);
     }
     pubmsg.payload = PAYLOAD;
-    pubmsg.payloadlen = strlen(PAYLOAD);
+    pubmsg.payloadlen = (int)strlen(PAYLOAD);
     pubmsg.qos = QOS;
     pubmsg.retained = 0;
     MQTTClient_publishMessage(client, TOPIC, &pubmsg, &token);

test/test1.c

@@ -547,7 +547,7 @@ int test2(struct Options options)
 	opts.MQTTVersion = options.MQTTVersion;
 	opts.username = "testuser";
 	opts.binarypwd.data = "testpassword";
-	opts.binarypwd.len = strlen(opts.binarypwd.data);
+	opts.binarypwd.len = (int)strlen(opts.binarypwd.data);
 	if (options.haconnections != NULL)
 	{
 		opts.serverURIs = options.haconnections;
@@ -1068,7 +1068,7 @@ int test6a(struct Options options)
 	opts.MQTTVersion = MQTTVERSION_3_1_1;
 	opts.will = &wopts;
 	opts.will->payload.data = test6_will_message;
-	opts.will->payload.len = strlen(test6_will_message) + 1;
+	opts.will->payload.len = (int)strlen(test6_will_message) + 1;
 	opts.will->qos = 1;
 	opts.will->retained = 0;
 	opts.will->topicName = test6_will_topic;

test/test4.c

@@ -471,7 +471,7 @@ int test2(struct Options options)
 	opts.cleansession = 1;
 	opts.username = "testuser";
 	opts.binarypwd.data = "testpassword";
-	opts.binarypwd.len = strlen(opts.binarypwd.data);
+	opts.binarypwd.len = (int)strlen(opts.binarypwd.data);
 	opts.MQTTVersion = options.MQTTVersion;
 
 	opts.will = &wopts;

test/test9.c

@@ -1726,7 +1726,7 @@ int test6(struct Options options)
 	/* let client c go: connect, and send disconnect command to proxy */
 	opts.will = &wopts;
 	opts.will->payload.data = "will message";
-	opts.will->payload.len = strlen(opts.will->payload.data) + 1;
+	opts.will->payload.len = (int)strlen(opts.will->payload.data) + 1;
 	opts.will->qos = 1;
 	opts.will->retained = 0;
 	opts.will->topicName = willTopic;
@@ -1870,7 +1870,6 @@ void test7cOnConnectSuccess(void* context, MQTTAsync_successData* response)
 {
 	MQTTAsync c = (MQTTAsync)context;
 	MQTTAsync_message pubmsg = MQTTAsync_message_initializer;
-	int rc;
 
 	MyLog(LOGA_DEBUG, "In connect onSuccess callback for client c, context %p\n", context);
 
@@ -1904,7 +1903,6 @@ void test7dOnConnectSuccess(void* context, MQTTAsync_successData* response)
 {
 	MQTTAsync c = (MQTTAsync)context;
 	MQTTAsync_responseOptions opts = MQTTAsync_responseOptions_initializer;
-	int rc;
 	int qoss[2] = {2, 2};
 	char* topics[2] = {willTopic, test_topic};
 
@@ -1933,7 +1931,6 @@ int test7(struct Options options)
 	char clientidc[50];
 	char clientidd[50];
 	int i = 0;
-	MQTTAsync_token *tokens;
 
 	test7_will_message_received = 0;
 	test7_messages_received = 0;