Zend/Optimizer/nop_removal.c: add const qualifiers

Author: Girgias

Zend/Optimizer/nop_removal.c

@@ -32,20 +32,20 @@
 
 void zend_optimizer_nop_removal(zend_op_array *op_array, zend_optimizer_ctx *ctx)
 {
-	zend_op *end, *opline;
+	zend_op *opline;
 	uint32_t new_count, i, shift;
 	uint32_t *shiftlist;
 	ALLOCA_FLAG(use_heap);
 
 	shiftlist = (uint32_t *)do_alloca(sizeof(uint32_t) * op_array->last, use_heap);
 	i = new_count = shift = 0;
-	end = op_array->opcodes + op_array->last;
+	const zend_op *end = op_array->opcodes + op_array->last;
 	for (opline = op_array->opcodes; opline < end; opline++) {
 
 		/* Kill JMP-over-NOP-s */
 		if (opline->opcode == ZEND_JMP && ZEND_OP1_JMP_ADDR(opline) > op_array->opcodes + i) {
 			/* check if there are only NOPs under the branch */
-			zend_op *target = ZEND_OP1_JMP_ADDR(opline) - 1;
+			const zend_op *target = ZEND_OP1_JMP_ADDR(opline) - 1;
 
 			while (target->opcode == ZEND_NOP) {
 				target--;