Bug #16195: SHOW VARIABLES doesn't report correctly sql_warnings and sql_notes values

  SQL_WARNINGS and SQL_NOTES were being displayed with SHOW_BOOL, but they
  are system variables that need SHOW_SYS to be used.

mysql-test/r/variables.result

@@ -584,3 +584,18 @@ set @@global.character_set_filesystem=default;
 select @@global.character_set_filesystem;
 @@global.character_set_filesystem
 binary
+set @@sql_notes = 0, @@sql_warnings = 0;
+show variables like 'sql_notes';
+Variable_name	Value
+sql_notes	OFF
+show variables like 'sql_warnings';
+Variable_name	Value
+sql_warnings	OFF
+set @@sql_notes = 1, @@sql_warnings = 1;
+show variables like 'sql_notes';
+Variable_name	Value
+sql_notes	ON
+show variables like 'sql_warnings';
+Variable_name	Value
+sql_warnings	ON
+End of 5.0 tests

mysql-test/t/variables.test

@@ -472,4 +472,15 @@ select @@character_set_filesystem;
 set @@global.character_set_filesystem=default;
 select @@global.character_set_filesystem;
 
-# End of 5.0 tests
+#
+# Bug #16195: SHOW VARIABLES doesn't report correctly sql_warnings and
+# sql_notes values
+# 
+set @@sql_notes = 0, @@sql_warnings = 0;
+show variables like 'sql_notes';
+show variables like 'sql_warnings';
+set @@sql_notes = 1, @@sql_warnings = 1;
+show variables like 'sql_notes';
+show variables like 'sql_warnings';
+
+--echo End of 5.0 tests

sql/set_var.cc

@@ -989,8 +989,8 @@ struct show_var_st init_vars[]= {
 #endif
   {sys_sort_buffer.name,      (char*) &sys_sort_buffer, 	    SHOW_SYS},
   {sys_sql_mode.name,         (char*) &sys_sql_mode,                SHOW_SYS},
-  {"sql_notes",               (char*) &sys_sql_notes,               SHOW_BOOL},
-  {"sql_warnings",            (char*) &sys_sql_warnings,            SHOW_BOOL},
+  {"sql_notes",               (char*) &sys_sql_notes,               SHOW_SYS},
+  {"sql_warnings",            (char*) &sys_sql_warnings,            SHOW_SYS},
   {sys_storage_engine.name,   (char*) &sys_storage_engine,          SHOW_SYS},
   {sys_sync_frm.name,         (char*) &sys_sync_frm,               SHOW_SYS},
 #ifdef HAVE_TZNAME