Bug 516567: [GTK] Crash when setting disposed image in Label.setImage 

Adding guard to honor illegal argument exception contract.
similar to TableItem:setImage().
This prevents the jvm crash reported in bug.

Also found the same issue in Decorations:setImage().

I checked all other setImage() calls in all SWT widgets,
all other calls had the appropriate guard (including Button).

Change-Id: I95c4f83e1c914c32110c8a6936f6393303c01923
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=516567
Signed-off-by: Leo Ufimtsev <lufimtse@redhat.com>
2 files changed
tree: c6d17f922d208b32d717a879e5b80c389baabd99
  1. .gitignore
  2. README.md
  3. bundles/
  4. examples/
  5. features/
  6. local-build/
  7. pom.xml
  8. tests/
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