Fix zend_may_throw() for FETCH_DIM_IS and ISSET_ISEMPTY_DIM_OBJ

Recentlty this insructions were updated to emit warning on inability to
convert double index to long. This may lead to exception.

This fixes memory leak on wordpress test suite (nightly workflow)

Author: dstogov

Zend/Optimizer/zend_inference.c

@@ -5127,9 +5127,9 @@ ZEND_API bool zend_may_throw_ex(const zend_op *opline, const zend_ssa_op *ssa_op
 		case ZEND_FETCH_IS:
 			return (t2 & (MAY_BE_ARRAY|MAY_BE_OBJECT));
 		case ZEND_ISSET_ISEMPTY_DIM_OBJ:
-			return (t1 & MAY_BE_OBJECT) || (t2 & (MAY_BE_ARRAY|MAY_BE_OBJECT));
+			return (t1 & MAY_BE_OBJECT) || (t2 & (MAY_BE_DOUBLE|MAY_BE_ARRAY|MAY_BE_OBJECT));
 		case ZEND_FETCH_DIM_IS:
-			return (t1 & MAY_BE_OBJECT) || (t2 & (MAY_BE_ARRAY|MAY_BE_OBJECT|MAY_BE_RESOURCE));
+			return (t1 & MAY_BE_OBJECT) || (t2 & (MAY_BE_DOUBLE|MAY_BE_ARRAY|MAY_BE_OBJECT|MAY_BE_RESOURCE));
 		case ZEND_CAST:
 			switch (opline->extended_value) {
 				case IS_LONG: