git-merge: show usage if run without arguments

diff --git a/merge-tree.c b/merge-tree.c
index c154dcfc0296879110a6adc3db849b5e6cee27cf..692ede0e3db7df66b2e5943dc58224f34c59fd8c 100644 (file)
--- a/merge-tree.c
+++ b/merge-tree.c
@@ -337,7 +337,7 @@ int main(int argc, char **argv)
        struct tree_desc t[3];
        void *buf1, *buf2, *buf3;
 
-       if (argc < 4)
+       if (argc != 4)
                usage(merge_tree_usage);
 
        setup_git_directory();