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Merge pull request #508 from JL2210/mod-by-zero-fix-2

Fix modulo by zero

--- a/src/link/patch.c

+++ b/src/link/patch.c

@@ -185,7 +185,13 @@

 			break;

 		case RPN_MOD:

 			value = popRPN();

-			value = popRPN() % value;

+			if (value == 0) {

+				error("%s: Modulo by 0", patch->fileName);

+				popRPN();

+				value = 0;

+			} else {

+				value = popRPN() % value;

+			}

 			break;

 		case RPN_UNSUB:

 			value = -popRPN();