Fixed potential memory leaks

ext/opcache/Optimizer/block_pass.c

@@ -937,6 +937,7 @@ static void assemble_code_blocks(zend_cfg *cfg, zend_op_array *op_array)
 				opline++;
 			}
 		}
+		free_alloca(map, use_heap);
 	}
 
 	/* adjust early binding list */

ext/opcache/Optimizer/zend_optimizer.c

@@ -380,6 +380,7 @@ void zend_optimizer_remove_live_range(zend_op_array *op_array, uint32_t var)
 				opline++;
 			}
 		}
+		free_alloca(map, use_heap);
 	}
 }