run_diff_{files,index}(): update calling convention.

diff --git a/builtin-diff.c b/builtin-diff.c
index a6590205e8f746304f3d06d3e328a05bf2bf954e..12d11f0c555d2ba80b2f14d4a43c13733574330e 100644 (file)
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -56,6 +56,10 @@ static int builtin_diff_files(struct rev_info *revs,
        if (revs->max_count < 0 &&
            (revs->diffopt.output_format & DIFF_FORMAT_PATCH))
                revs->combine_merges = revs->dense_combined_merges = 1;
+       if (read_cache() < 0) {
+               perror("read_cache");
+               return -1;
+       }
        return run_diff_files(revs, silent);
 }
 
@@ -151,6 +155,10 @@ static int builtin_diff_index(struct rev_info *revs,
            revs->max_count != -1 || revs->min_age != -1 ||
            revs->max_age != -1)
                usage(builtin_diff_usage);
+       if (read_cache() < 0) {
+               perror("read_cache");
+               return -1;
+       }
        return run_diff_index(revs, cached);
 }