Silence some warnings

Author: LibretroAdmin

audio/drivers/rsound.c

@@ -151,6 +151,7 @@ static ssize_t rs_write(void *data, const void *buf, size_t len)
       }
       return _len;
    }
+   return 0;
 }
 
 static bool rs_stop(void *data)

tasks/task_content.c

@@ -828,7 +828,8 @@ static void content_file_get_path(
          {
             if (previous_serialized_path != NULL)
                free(previous_serialized_path);
-            previous_serialized_path = content_path = serialized_path;
+            previous_serialized_path = (char*)serialized_path;
+            content_path             = (char*)serialized_path;
          }
       }
    }