Advisor: Check for possibly undefined memory usage values

Signed-off-by: Ann + J.M <phpMyAdmin@ZweiSteinSoft.de>
Advisor class: Drop unnecessary initialization

Signed-off-by: Ann + J.M <phpMyAdmin@ZweiSteinSoft.de>
PMA_Bookmark_delete: Drop unnecessary $db param

Signed-off-by: Ann + J.M <phpMyAdmin@ZweiSteinSoft.de>
Config class: Drop dead initializations

Signed-off-by: Ann + J.M <phpMyAdmin@ZweiSteinSoft.de>
Add string check for json_decode in SavedSearches::setCriterias

Signed-off-by: Ann + J.M <phpMyAdmin@ZweiSteinSoft.de>
Code style fixes

Signed-off-by: Ann + J.M <phpMyAdmin@ZweiSteinSoft.de>
Code style fixes

Signed-off-by: Ann + J.M <phpMyAdmin@ZweiSteinSoft.de>
Code style fixes

Signed-off-by: Ann + J.M <phpMyAdmin@ZweiSteinSoft.de>
Complete the fix for bug #4418

Signed-off-by: Marc Delisle <marc@infomarc.info>
Merge commit '9207203'
Merge branch 'QA_4_2'