win_dynld: use LoadLibraryA specifically

src/qt/win_dynld.c

@@ -51,7 +51,7 @@ dynld_module(const char *name, dllimp_t *table)
     void     *func;
 
     /* See if we can load the desired module. */
-    if ((h = LoadLibrary(name)) == NULL) {
+    if ((h = LoadLibraryA(name)) == NULL) {
         dynld_log("DynLd(\"%s\"): library not found! (%08X)\n", name, GetLastError());
         return (NULL);
     }