zend_compile: Attempt to fix the C++ build

Author: TimWolla

Zend/zend_compile.h

@@ -498,14 +498,14 @@ typedef struct _zend_class_constant {
 #define ZEND_CLASS_CONST_FLAGS(c) Z_CONSTANT_FLAGS((c)->value)
 
 #if __STDC_VERSION__ >= 202311L
-enum zend_function_type: uint8_t {
+enum _zend_function_type: uint8_t {
 	ZEND_INTERNAL_FUNCTION = 1,
 	ZEND_USER_FUNCTION = 2,
 	ZEND_EVAL_CODE = 4,
 };
-typedef enum zend_function_type zend_function_type;
+typedef enum _zend_function_type zend_function_type;
 #else
-enum zend_function_type {
+enum _zend_function_type {
 	ZEND_INTERNAL_FUNCTION = 1,
 	ZEND_USER_FUNCTION = 2,
 	ZEND_EVAL_CODE = 4,