Merge branch 'jh/sparse-index-expand-to-path-fix'

A caller called index_file_exists() that takes a string expressed
as <ptr, length> with a wrong length, which has been corrected.

* jh/sparse-index-expand-to-path-fix:
  sparse-index: pass string length to index_file_exists()

Author: gitster

sparse-index.c

@@ -579,8 +579,9 @@ void expand_to_path(struct index_state *istate,
 		replace++;
 		temp = *replace;
 		*replace = '\0';
+		substr_len = replace - path_mutable.buf;
 		if (index_file_exists(istate, path_mutable.buf,
-				      path_mutable.len, icase)) {
+				      substr_len, icase)) {
 			/*
 			 * We found a parent directory in the name-hash
 			 * hashtable, because only sparse directory entries
@@ -593,7 +594,6 @@ void expand_to_path(struct index_state *istate,
 		}
 
 		*replace = temp;
-		substr_len = replace - path_mutable.buf;
 	}
 
 cleanup: