Made some small modifications (backing extraction)

src/backing.c

@@ -396,24 +396,24 @@ result_t get_backing_parent(char** _parent, const char* backing) {
 		return result;
 	}
 
-	// If the disk is not backed, return success and a null parent
+	// Free the backing path as it is not needed anymore
+	free(path);
+
+	// Check if the disk is backed
 	if (info.backing_path == NULL) {
 		free_disk_info(&info);
-		free(path);
 		return success();
 	}
 
 	// Get the backing identifier of the parent
 	char* parent = strdup(basename(info.backing_path));
-	if (parent == NULL) {
-		free_disk_info(&info);
-		free(path);
-		return failure("Failed to get the backing identifier of the parent.");
-	}
 
+	// Free the disk info as it is not needed anymore
 	free_disk_info(&info);
-	free(path);
+
+	if (parent == NULL)
+		return failure("Failed to get the backing identifier of the parent.");
 
 	*_parent = parent;
-	return result;
+	return success();
 }