add more informative error messages to git-mktag

diff --git a/git-compat-util.h b/git-compat-util.h
index f982b8e48469a5f09698808d1e55ded04d5923b8..5d543d29f85e432a89bb8cbfbe2d18205599b06f 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -9,6 +9,8 @@
 #endif
 #endif
 
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
 #include <unistd.h>
 #include <stdio.h>
 #include <sys/stat.h>