fix regression from last commit - stagit

commit 2d8eb85f01fdb97ab76c538b868128db4c3e99f0
parent 9328d2690e118127bcaa5cf9f665d8e7711f7a03
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Tue,  3 May 2016 20:28:09 +0200

fix regression from last commit

Diffstat:
M stagit.c  | 2 +-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/stagit.c b/stagit.c
@@ -708,7 +708,7 @@ writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t fi
     if (mkdirp(d))
         return -1;
 
-    for (p = fpath; *p; p++) {
+    for (p = fpath, tmp[0] = '\0'; *p; p++) {
         if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
             errx(1, "path truncated: '../%s'", tmp);
         p++;