Fix fuzzer runner

We must take into account the calling convention of the tailcall vm.

Author: ndossche

sapi/fuzzer/fuzzer-execute-common.h

@@ -32,10 +32,6 @@
 static uint32_t steps_left;
 static bool bailed_out = false;
 
-/* Because the fuzzer is always compiled with clang,
- * we can assume that we don't use global registers / hybrid VM. */
-typedef zend_op *(ZEND_FASTCALL *opcode_handler_t)(zend_execute_data *, const zend_op *);
-
 static zend_always_inline void fuzzer_bailout(void) {
 	bailed_out = true;
 	zend_bailout();
@@ -67,7 +63,7 @@ static void fuzzer_execute_ex(zend_execute_data *execute_data) {
 
 	while (1) {
 		fuzzer_step();
-		opline = ((opcode_handler_t) opline->handler)(execute_data, opline);
+		opline = opline->handler(execute_data, opline);
 		if ((uintptr_t) opline & ZEND_VM_ENTER_BIT) {
 			opline = (const zend_op *) ((uintptr_t) opline & ~ZEND_VM_ENTER_BIT);
 			if (opline) {