Suite: fix exu files comparison

To compare two exu files during the test suite, we need to unpack
the images in directories and make the comparison from there.
The problem is that the "orig" exu file was unpacked in the current
directory as well, leading to compare an image with itself.

The fix consists in unpacking the right exu file.

src/bin/exactness.c

@@ -170,12 +170,14 @@ _run_test_compare(const List_Entry *ent)
         sprintf(path, "%s/%s.exu", base_dir, ent->name);
         if (ecore_file_exists(path))
           {
-             char *currentdir = alloca(strlen(_dest_dir) + 20);
-             sprintf(currentdir, "%s/%s", _dest_dir, CURRENT_SUBDIR);
-             _exu_imgs_unpack(path, currentdir, ent->name);
+             char *currentdir;
              sprintf(origdir, "%s/%s/%s", _dest_dir, CURRENT_SUBDIR, ORIG_SUBDIR);
              mkdir(origdir, 0744);
              _exu_imgs_unpack(path, origdir, ent->name);
+             sprintf(path, "%s/%s/%s.exu", _dest_dir, CURRENT_SUBDIR, ent->name);
+             currentdir = alloca(strlen(_dest_dir) + 20);
+             sprintf(currentdir, "%s/%s", _dest_dir, CURRENT_SUBDIR);
+             _exu_imgs_unpack(path, currentdir, ent->name);
              goto found;
           }
         else