Fix division by zero during modulo operation

tree.go

@@ -333,10 +333,14 @@ func (operation *Operation) Solution () (solution int64, err error) {
 			if err != nil { return }
 			if index == 0 {
 				solution = subSolution
+			} else {
+				if subSolution == 0 {
+					err = ErrorDivideByZero
 				} else {
 					solution %= subSolution
 				}
 			}
+		}
 	case OpcodeOr:
 		for _, operand := range operation.operands {
 			subSolution, err = operand.Solution()