Change CFG construction

Author: ndossche

Zend/Optimizer/zend_cfg.c

@@ -530,12 +530,12 @@ ZEND_API void zend_build_cfg(zend_arena **arena, const zend_op_array *op_array,
 			case ZEND_JMPNZ_EX:
 			case ZEND_JMP_SET:
 			case ZEND_JMP_NULL:
-				block->successors_count = 2;
 				block->successors[0] = block_map[OP_JMP_ADDR(opline, opline->op2) - op_array->opcodes];
 				if (j + 1 < blocks_count) {
+					block->successors_count = 2;
 					block->successors[1] = j + 1;
 				} else {
-					block->successors[1] = j; /* last instruction and its own target */
+					block->successors_count = 1;
 				}
 				break;
 			case ZEND_COALESCE: