stash: convert show to builtin

diff --git a/builtin/merge-file.c b/builtin/merge-file.c
index 47dde7c39c922c77bf388e87db27618d09f5bb74..06a2f90c4875f2a8ff82a927071ac584ad929f8b 100644 (file)
--- a/builtin/merge-file.c
+++ b/builtin/merge-file.c
@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "config.h"
 #include "xdiff/xdiff.h"
 #include "xdiff-interface.h"
 #include "parse-options.h"
@@ -14,6 +15,8 @@ static int label_cb(const struct option *opt, const char *arg, int unset)
        static int label_count = 0;
        const char **names = (const char **)opt->value;
 
+       BUG_ON_OPT_NEG(unset);
+
        if (label_count >= 3)
                return error("too many labels on the command line");
        names[label_count++] = arg;