[PATCH 2/3] submodule: used correct index in is_staging_gitmodules_ok

[Brandon Williams <bmwill@google.com>]

Commit 883e248b8 (fsmonitor: teach git to optionally utilize a file
system monitor to speed up detecting new or changed files., 2017-09-22)
introduced a call to 'ce_match_stat()' in 'is_staging_gitmodules_ok()'
which implicitly relys on the the global 'the_index' instead of the
passed in 'struct index_state'.  Fix this by changing the call to
'ie_match_stat()' and using the passed in index_state struct.

Signed-off-by: Brandon Williams <bmwill@google.com>
---
 submodule.c | 5 +++--
 submodule.h | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/submodule.c b/submodule.c
index 7097be806..a9670eaae 100644
--- a/submodule.c
+++ b/submodule.c
@@ -55,14 +55,15 @@ int is_gitmodules_unmerged(const struct index_state *istate)
  * future version when we learn to stage the changes we do ourselves without
  * staging any previous modifications.
  */
-int is_staging_gitmodules_ok(const struct index_state *istate)
+int is_staging_gitmodules_ok(struct index_state *istate)
 {
 	int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE));
 
 	if ((pos >= 0) && (pos < istate->cache_nr)) {
 		struct stat st;
 		if (lstat(GITMODULES_FILE, &st) == 0 &&
-		    ce_match_stat(istate->cache[pos], &st, CE_MATCH_IGNORE_FSMONITOR) & DATA_CHANGED)
+		    ie_match_stat(istate, istate->cache[pos], &st,
+				  CE_MATCH_IGNORE_FSMONITOR) & DATA_CHANGED)
 			return 0;
 	}
 
diff --git a/submodule.h b/submodule.h
index cd984ecba..e2a5de3d8 100644
--- a/submodule.h
+++ b/submodule.h
@@ -34,7 +34,7 @@ struct submodule_update_strategy {
 #define SUBMODULE_UPDATE_STRATEGY_INIT {SM_UPDATE_UNSPECIFIED, NULL}
 
 extern int is_gitmodules_unmerged(const struct index_state *istate);
-extern int is_staging_gitmodules_ok(const struct index_state *istate);
+extern int is_staging_gitmodules_ok(struct index_state *istate);
 extern int update_path_in_gitmodules(const char *oldpath, const char *newpath);
 extern int remove_path_from_gitmodules(const char *path);
 extern void stage_updated_gitmodules(struct index_state *istate);
-- 
2.15.1.504.g5279b80103-goog