Solves bug 2965095 : Name Engine MRG_MYISAM different for MySQL 5.1.x (and newer)
New :
* function PMA_Table::isMerge(), that checks if a table is of the merge type.
Changes :
* function PMA_Table::sGetStatusInfo() : added parameter to suppress error message if a property doesn't exist. (parameter switched off by default)
* replace all current checks for MRG_MyISAM in the project by the new isMerge function.
Tested with MySQL 5.1.31 and 5.0.45
Changes based on latest trunk (git)
added PMA_Table::isMerge()
Merged in subversion, thanks.