pack-bitmap.c: apply pseudo-merge commits with incremental MIDXs

Prepare for using pseudo-merges with incremental MIDX bitmaps by
attempting to apply pseudo-merges from each layer when encountering a
given commit during a walk.

Signed-off-by: Taylor Blau <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: ttaylorr

pack-bitmap.c

@@ -1087,10 +1087,15 @@ static unsigned apply_pseudo_merges_for_commit_1(struct bitmap_index *bitmap_git
 						 struct commit *commit,
 						 uint32_t commit_pos)
 {
-	int ret;
+	struct bitmap_index *curr = bitmap_git;
+	int ret = 0;
 
-	ret = apply_pseudo_merges_for_commit(&bitmap_git->pseudo_merges,
-					     result, commit, commit_pos);
+	while (curr) {
+		ret += apply_pseudo_merges_for_commit(&curr->pseudo_merges,
+						      result, commit,
+						      commit_pos);
+		curr = curr->base;
+	}
 
 	if (ret)
 		pseudo_merges_satisfied_nr += ret;