fix for bug#12001

sql-common/client.c:
  fixed wrong offset
tests/mysql_client_test.c:
  testcase for bug #12001

sql-common/client.c

@@ -755,7 +755,7 @@ static void cli_flush_use_result(MYSQL *mysql)
     {
       if (protocol_41(mysql))
       {
-        char *pos= (char*) mysql->net.read_pos;
+        char *pos= (char*) mysql->net.read_pos + 1;
         mysql->warning_count=uint2korr(pos); pos+=2;
         mysql->server_status=uint2korr(pos); pos+=2;
       }

tests/mysql_client_test.c

@@ -11751,6 +11751,49 @@ static void test_bug11183()
   myquery(rc);
 }
 
+static void test_bug12001()
+{
+  MYSQL *mysql_local;
+  MYSQL_RES *result;
+  const char *query = "DROP TABLE IF EXISTS test_table;"
+                      "CREATE TABLE test_table(id INT);" 
+                      "INSERT INTO test_table VALUES(10);" 
+                      "UPDATE test_table SET id=20 WHERE id=10;" 
+                      "SELECT * FROM test_table;" 
+                      "INSERT INTO non_existent_table VALUES(11);";
+  int rc, res;
+
+  myheader("test_bug12001");
+
+  if (!(mysql_local= mysql_init(NULL)))
+  {
+    fprintf(stdout, "\n mysql_init() failed");
+    exit(1);
+  }
+
+  /* Create connection that supports multi statements */
+  if (!mysql_real_connect(mysql_local, opt_host, opt_user,
+                           opt_password, current_db, opt_port,
+                           opt_unix_socket, CLIENT_MULTI_STATEMENTS | CLIENT_MULTI_RESULTS)) {
+    fprintf(stdout, "\n mysql_real_connect() failed");
+    exit(1);
+  }
+
+  rc = mysql_query(mysql_local, query);
+  myquery(rc);
+
+  do {
+    if (mysql_field_count(mysql_local) && (result = mysql_use_result(mysql_local)))  {
+      mysql_free_result(result);	
+    }
+  } while (!(res = mysql_next_result(mysql_local))); 
+  
+  rc = mysql_query(mysql_local, "DROP TABLE IF EXISTS test_table");
+  myquery(rc);
+
+  mysql_close(mysql_local);
+  DIE_UNLESS(res==1);
+}
 
 /*
   Read and parse arguments and MySQL options from my.cnf
@@ -11968,6 +12011,7 @@ static struct my_tests_st my_tests[]= {
   { "test_bug8378", test_bug8378 },
   { "test_bug9735", test_bug9735 },
   { "test_bug11183", test_bug11183 },
+  { "test_bug12001", test_bug12001 },
   { 0, 0 }
 };