improve commitinfo_getstats - stagit

commit 8fa0effa9846a18a60d3b6a7c96db42a2775a7c6
parent 8eabe24bdda7003453bbd034d82ebc479e2c76bc
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Sat, 22 Apr 2017 19:07:07 +0200

improve commitinfo_getstats

- reorder: unnecessary allocation when git_patch_from_diff fails.
- no need to free patch object when git_patch_from_diff fails.

Diffstat:
M stagit.c  | 7 ++-----

1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/stagit.c b/stagit.c
@@ -110,13 +110,10 @@ commitinfo_getstats(struct commitinfo *ci)
         err(1, "calloc");
 
     for (i = 0; i < ndeltas; i++) {
+        if (git_patch_from_diff(&patch, ci->diff, i))
+            goto err;
         if (!(di = calloc(1, sizeof(struct deltainfo))))
             err(1, "calloc");
-        if (git_patch_from_diff(&patch, ci->diff, i)) {
-            git_patch_free(patch);
-            free(di);
-            goto err;
-        }
         di->patch = patch;
         ci->deltas[i] = di;