A fix (Bug #5432: Is this a leak in mysql console client?)

client/mysql.cc

@@ -2220,7 +2220,9 @@ com_use(String *buffer __attribute__((unused)), char *line)
     under our feet, for example if DROP DATABASE or RENAME DATABASE
     (latter one not yet available by the time the comment was written)
   */
-  current_db= 0; // Let's reset current_db, assume it's gone
+  /*  Let's reset current_db, assume it's gone */
+  my_free(current_db, MYF(MY_ALLOW_ZERO_PTR));
+  current_db= 0;
   /*
     We don't care about in case of an error below because current_db
     was just set to 0.
@@ -2229,10 +2231,8 @@ com_use(String *buffer __attribute__((unused)), char *line)
       (res= mysql_use_result(&mysql)))
   {
     row= mysql_fetch_row(res);
-    if (row[0] &&
-        (!current_db || cmp_database(current_db, row[0])))
+    if (row[0])
     {
-      my_free(current_db, MYF(MY_ALLOW_ZERO_PTR));
       current_db= my_strdup(row[0], MYF(MY_WME));
     }
     (void) mysql_fetch_row(res);               // Read eof