fixup! ostree-repo-libarchive.c: major refactor

That's what I actually meant, although it doesn't make difference in the
final behaviour.

src/libostree/ostree-repo-libarchive.c

@@ -79,7 +79,7 @@ path_relative (const char *src)
   /* assume a single '.' means the root dir itself, which we handle as the empty
    * string in our code */
   if (src[0] == '.' && src[1] == '\0')
-    return src += 1;
+    src += 1;
 
   return src;
 }