inputsynth: g_debug instead of g_print for debug output

src/inputsynth.c

@@ -62,7 +62,7 @@ _load_library (InputsynthBackend backend)
       return NULL;
     }
 
-  g_print ("Load module %s from path %s\n", module_name->str, plugin_dir);
+  g_debug ("Load module %s from path %s\n", module_name->str, plugin_dir);
 
   GModule *module;
   gchar *module_path = NULL;