Remove bogus __attribute__((nonnull))

These were reported when running tests after compiling the debug server
with -O3 -fsanitize=undefined in GCC 7.1.0.

storage/innobase/fts/fts0que.cc

@@ -2430,7 +2430,8 @@ fts_query_terms_in_document(
 /*****************************************************************//**
 Retrieve the document and match the phrase tokens.
 @return DB_SUCCESS or error code */
-static MY_ATTRIBUTE((nonnull, warn_unused_result))
+MY_ATTRIBUTE((nonnull(1,2,3,6), warn_unused_result))
+static
 dberr_t
 fts_query_match_document(
 /*=====================*/

storage/innobase/include/rem0cmp.h

 /*****************************************************************************
 
 Copyright (c) 1994, 2016, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 2017, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -62,7 +63,7 @@ cmp_data_data(
 	ulint		len1,
 	const byte*	data2,
 	ulint		len2)
-	MY_ATTRIBUTE((nonnull, warn_unused_result));
+	MY_ATTRIBUTE((warn_unused_result));
 
 /** Compare two data fields.
 @param[in] dfield1 data field; must have type field set

storage/innobase/include/row0merge.h

@@ -195,7 +195,7 @@ row_merge_drop_temp_indexes(void);
 
 /** Create temporary merge files in the given paramater path, and if
 UNIV_PFS_IO defined, register the file descriptor with Performance Schema.
-@param[in]	path	location for creating temporary merge files.
+@param[in]	path	location for creating temporary merge files, or NULL
 @return File descriptor */
 int
 row_merge_file_create_low(
@@ -398,13 +398,13 @@ row_merge_buf_empty(
 
 /** Create a merge file in the given location.
 @param[out]	merge_file	merge file structure
-@param[in]	path		location for creating temporary file
+@param[in]	path		location for creating temporary file, or NULL
 @return file descriptor, or -1 on failure */
 int
 row_merge_file_create(
 	merge_file_t*	merge_file,
 	const char*	path)
-	MY_ATTRIBUTE((warn_unused_result, nonnull));
+	MY_ATTRIBUTE((warn_unused_result, nonnull(1)));
 
 /** Merge disk files.
 @param[in]	trx	transaction

storage/innobase/row/row0merge.cc

@@ -4030,7 +4030,7 @@ row_merge_drop_temp_indexes(void)
 
 /** Create temporary merge files in the given paramater path, and if
 UNIV_PFS_IO defined, register the file descriptor with Performance Schema.
-@param[in]	path	location for creating temporary merge files.
+@param[in]	path	location for creating temporary merge files, or NULL
 @return File descriptor */
 int
 row_merge_file_create_low(
@@ -4063,7 +4063,7 @@ row_merge_file_create_low(
 
 /** Create a merge file in the given location.
 @param[out]	merge_file	merge file structure
-@param[in]	path		location for creating temporary file
+@param[in]	path		location for creating temporary file, or NULL
 @return file descriptor, or -1 on failure */
 int
 row_merge_file_create(
@@ -4373,7 +4373,8 @@ row_merge_rename_tables_dict(
 @param[in,out]	index	index
 @param[in]	add_v	new virtual columns added along with add index call
 @return DB_SUCCESS or error code */
-static MY_ATTRIBUTE((nonnull, warn_unused_result))
+MY_ATTRIBUTE((nonnull(1,2,3), warn_unused_result))
+static
 dberr_t
 row_merge_create_index_graph(
 	trx_t*			trx,