Fix for BUG#7787: Stored procedures: improper warning for "grant execute" statement.

The problem was that error flag was not reset.

mysql-test/r/sp-security.result

@@ -314,3 +314,12 @@ select * from db_bug14533.t1;
 ERROR 42000: SELECT command denied to user 'user_bug14533'@'localhost' for table 't1'
 drop user user_bug14533@localhost;
 drop database db_bug14533;
+CREATE DATABASE db_bug7787;
+use db_bug7787;
+CREATE PROCEDURE p1()
+SHOW INNODB STATUS;
+Warnings:
+Warning	1287	'SHOW INNODB STATUS' is deprecated; use 'SHOW ENGINE INNODB STATUS' instead
+GRANT EXECUTE ON PROCEDURE p1 TO user_bug7787@localhost;
+DROP DATABASE db_bug7787;
+use test;

mysql-test/t/sp-security.test

@@ -525,4 +525,26 @@ disconnect user_bug14533;
 drop user user_bug14533@localhost;
 drop database db_bug14533;
 
+
+#
+# BUG#7787: Stored procedures: improper warning for "grant execute" statement
+#
+
+# Prepare.
+
+CREATE DATABASE db_bug7787;
+use db_bug7787;
+
+# Test.
+
+CREATE PROCEDURE p1()
+  SHOW INNODB STATUS; 
+
+GRANT EXECUTE ON PROCEDURE p1 TO user_bug7787@localhost; 
+
+# Cleanup.
+
+DROP DATABASE db_bug7787;
+use test;
+
 # End of 5.0 bugs.

sql/sp.cc

@@ -1012,6 +1012,7 @@ sp_exist_routines(THD *thd, TABLE_LIST *routines, bool any, bool no_error)
 {
   TABLE_LIST *routine;
   bool result= 0;
+  bool sp_object_found;
   DBUG_ENTER("sp_exists_routine");
   for (routine= routines; routine; routine= routine->next_global)
   {
@@ -1024,10 +1025,12 @@ sp_exist_routines(THD *thd, TABLE_LIST *routines, bool any, bool no_error)
     lex_name.str= thd->strmake(routine->table_name, lex_name.length);
     name= new sp_name(lex_db, lex_name);
     name->init_qname(thd);
-    if (sp_find_routine(thd, TYPE_ENUM_PROCEDURE, name,
-                        &thd->sp_proc_cache, FALSE) != NULL ||
-        sp_find_routine(thd, TYPE_ENUM_FUNCTION, name,
-                        &thd->sp_func_cache, FALSE) != NULL)
+    sp_object_found= sp_find_routine(thd, TYPE_ENUM_PROCEDURE, name,
+                                     &thd->sp_proc_cache, FALSE) != NULL ||
+                     sp_find_routine(thd, TYPE_ENUM_FUNCTION, name,
+                                     &thd->sp_func_cache, FALSE) != NULL;
+    mysql_reset_errors(thd, TRUE);
+    if (sp_object_found)
     {
       if (any)
         DBUG_RETURN(1);