Fix JMPZ, JMPZNZ_EX chain optimization

The result_type was not copied, resulting in a corrupted JMPZ_EX.
Fix can be verified by inspecting the opcodes of the following
function (it should not contain any _EX opcodes):

function test() {
    if ($a && $b) {
        echo "a";
    }

    if ($b || $c || $d) {
        echo "b";
    }
}

Conflicts:
	ext/opcache/Optimizer/block_pass.c

Author: nikic

ext/opcache/Optimizer/block_pass.c

@@ -1471,9 +1471,9 @@ static void zend_jmp_optimization(zend_code_block *block, zend_op_array *op_arra
 				    		same_var == VAR_NUM_EX(target->op1) &&
 							target_block->follow_to &&
 							!target_block->protected) {
-					/* JMPZ(X, L), L: X = JMPNZ_EX(X, L2) -> JMPZ(X, L+1) */
+					/* JMPZ(X, L), L: T = JMPNZ_EX(X, L2) -> T = JMPZ_EX(X, L+1) */
 					last_op->opcode += 3;
-					last_op->result = target->result;
+					COPY_NODE(last_op->result, target->result);
 					del_source(block, block->op2_to);
 					block->op2_to = target_block->follow_to;
 					ADD_SOURCE(block, block->op2_to);