Fix an horrible bug in Gambas.
The 0.92 IDE corrupts tabstrips in forms when you save them! If you have a
tabstrip with three tabs, for example, then each tab will have the same
children controls as the first one! This is the reason why some people wrote
that the compiler said an unexpected '"Frame1" already defined' or something
Approved by: pav (mentor)
Obtained from: the author.