libobs: Search through modules backwards

Plugins are now required to be installed in %PROGRAMDATA%. Since
its module path is added after the default module paths, the
plugins in there will be loaded last. With the load modules once
PR (#12285), the module added in the default path will be the only one
loaded. We want the one in %PROGRAMDATA% to be the one loaded instead.

Author: cg2121

libobs/obs-module.c

@@ -552,8 +552,8 @@ void obs_find_modules2(obs_find_module_callback2_t callback, void *param)
 	if (!obs)
 		return;
 
-	for (size_t i = 0; i < obs->module_paths.num; i++) {
-		struct obs_module_path *omp = obs->module_paths.array + i;
+	for (size_t i = obs->module_paths.num; i > 0; i--) {
+		struct obs_module_path *omp = obs->module_paths.array + (i - 1);
 		find_modules_in_path(omp, callback, param);
 	}
 }