Follow up to r17201.

Fixed a small logic issue.
Related to: bugreport:7377

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@17202 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/map/status.c

@@ -6359,7 +6359,7 @@ int status_get_sc_def(struct block_list *bl, enum sc_type type, int rate, int ti
 			//Effect that cannot be reduced? Likely a buff.
 			if (!(rnd()%10000 < rate))
 				return 0;
-			return max(1,tick);
+			return tick ? tick : 1;
 	}
 
 	if (sd) {