updated for version 7.4.133
Problem:    Clang warns for using NUL.
Solution:   Change NUL to NULL. (Dominique Pelle)
diff --git a/src/misc2.c b/src/misc2.c
index 6506203..a9d7a82 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -4695,8 +4695,8 @@
 	else
 	{
 	    char_u *p =  gettail(search_ctx->ffsc_fix_path);
-	    char_u *wc_path = NUL;
-	    char_u *temp = NUL;
+	    char_u *wc_path = NULL;
+	    char_u *temp = NULL;
 	    int    len = 0;
 
 	    if (p > search_ctx->ffsc_fix_path)