commit d1d969e151c8a2079ccbe168559dd851fd0bee97
author Tim Buschtöns <tbuschto@eclipsesource.com> Thu Apr 17 11:01:31 2014 +0200
committer Gerrit Code Review @ Eclipse.org <gerrit@eclipse.org> Thu Apr 17 07:33:12 2014 -0400
tree 85c2f2952845d41031db81df8475a34faa1427e3
parent 06201fe54e8e14a27208d8c7a862c0827603a659

Prevent crash when preparing enhanced (SVG/VML) background 

See Bug 432909 - Client may crash in IE7/8/9 due to implementation error
in Parent._computeVisibleChildren

Possibly introduced by fixing Bug 359665 - Background transparent don't
work in IE 

It is possible under some unknown (but rare) conditions to crash the
client if a widget is creating an SVG/VML background (calling
prepareEnhancedBorder) while it's children are not yet visible but
already returned as such by _computeVisibleChildren.

The implementation of _computeVisibleChildren, while technically not
correct, can not be changed because some methods in Parent.js rely on
it's specific behavior. Therefore I added a pre-check just before the
expression that caused the crash.

Change-Id: I432ee325f3925635395be1a6f4170ddea4479527
Signed-off-by: Tim Buschtöns <tbuschto@eclipsesource.com>