Minor nits fixes

Author: Girgias

ext/pdo/pdo_stmt.c

@@ -656,7 +656,7 @@ static bool pdo_call_fetch_object_constructor(zend_function *constructor, HashTa
 	};
 
 	zend_call_function(&fci, &fcc);
-	bool failed = Z_ISUNDEF(retval_constructor_call);;
+	bool failed = Z_ISUNDEF(retval_constructor_call);
 	zval_ptr_dtor(&retval_constructor_call);
 
 	return failed;
@@ -746,7 +746,7 @@ static bool do_fetch(pdo_stmt_t *stmt, zval *return_value, enum pdo_fetch_type h
 
 		case PDO_FETCH_OBJ:
 			ce = zend_standard_class_def;
-			object_init_ex(return_value, zend_standard_class_def);
+			object_init(return_value);
 			break;
 
 		case PDO_FETCH_CLASS:
@@ -838,7 +838,7 @@ static bool do_fetch(pdo_stmt_t *stmt, zval *return_value, enum pdo_fetch_type h
 		zval unserialization_string;
 		fetch_value(stmt, &unserialization_string, column_index_to_fetch, NULL);
 
-		const unsigned char *str = (unsigned char*) "";
+		const unsigned char *str = (const unsigned char*) "";
 		size_t str_len = 0;
 		if (Z_TYPE(unserialization_string) == IS_STRING) {
 			str = (unsigned char*) Z_STRVAL(unserialization_string);