Fix unbalanced NEW call_level in JIT

For NEW followed by DO_FCALL, we handle both together and skip
over the DO_FCALL, which means that the call_level for it will
not be decremented. Do so explicitly instead.

Author: nikic

ext/opcache/jit/zend_jit.c

@@ -4034,6 +4034,9 @@ static int zend_jit(const zend_op_array *op_array, zend_ssa *ssa, const zend_op
 								zend_jit_do_fcall(&dasm_state, next_opline, op_array, ssa, call_level, b + 1, NULL);
 							}
 						}
+
+						/* We skip over the DO_FCALL, so decrement call_level ourselves. */
+						call_level--;
 					}
 					break;
 				default: