teach diffcore-rename to optionally ignore empty content

diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 07bd984084fbbfbb826ef5b784fc68069675e73c..8ed501f220424976cc30f4a4dbf3d59f979902be 100644 (file)
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -226,14 +226,8 @@ static const char * const cat_file_usage[] = {
 
 static int git_cat_file_config(const char *var, const char *value, void *cb)
 {
-       switch (userdiff_config(var, value)) {
-       case 0:
-               break;
-       case -1:
+       if (userdiff_config(var, value) < 0)
                return -1;
-       default:
-               return 0;
-       }
 
        return git_default_config(var, value, cb);
 }