Manual merge of the fix for BUG#4285 from 4.1

sql/sql_show.cc:
  removed sql_key_cache

sql/sql_show.cc

@@ -1512,7 +1512,7 @@ static bool show_status_array(THD *thd, const char *wild,
 #endif /* HAVE_OPENSSL */
         case SHOW_KEY_CACHE_LONG:
         case SHOW_KEY_CACHE_CONST_LONG:
-          value= (value-(char*) &dflt_key_cache_var)+ (char*) sql_key_cache;
+          value= (value-(char*) &dflt_key_cache_var)+ (char*) dflt_key_cache;
           end= int10_to_str(*(long*) value, buff, 10);
           break;
         case SHOW_UNDEF:				// Show never happen