Merge pull request #4095 from mplough/master

Fix uninitialized variable warning

src/submodule.c

@@ -401,7 +401,7 @@ done:
 static int submodules_from_head(git_strmap *map, git_tree *head, git_config *cfg)
 {
 	int error;
-	git_iterator *i;
+	git_iterator *i = NULL;
 	const git_index_entry *entry;
 	git_strmap *names = 0;
 	git_strmap_alloc(&names);