Fix ma_dlopen() on the GDK build.

miniaudio.h

@@ -18455,9 +18455,9 @@ MA_API ma_handle ma_dlopen(ma_context* pContext, const char* filename)
 
     ma_log_postf(ma_context_get_log(pContext), MA_LOG_LEVEL_DEBUG, "Loading library: %s\n", filename);
 
-#ifdef _WIN32
+    #ifdef MA_WIN32
         /* From MSDN: Desktop applications cannot use LoadPackagedLibrary; if a desktop application calls this function it fails with APPMODEL_ERROR_NO_PACKAGE.*/
-    #if !defined(WINAPI_FAMILY) || (defined(WINAPI_FAMILY) && (defined(WINAPI_FAMILY_DESKTOP_APP) && WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+        #if !defined(MA_WIN32_UWP)
             handle = (ma_handle)LoadLibraryA(filename);
         #else
             /* *sigh* It appears there is no ANSI version of LoadPackagedLibrary()... */
@@ -18493,7 +18493,7 @@ MA_API ma_handle ma_dlopen(ma_context* pContext, const char* filename)
 MA_API void ma_dlclose(ma_context* pContext, ma_handle handle)
 {
 #ifndef MA_NO_RUNTIME_LINKING
-#ifdef _WIN32
+    #ifdef MA_WIN32
         FreeLibrary((HMODULE)handle);
     #else
         dlclose((void*)handle);