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-rw-r--r--vcl/source/gdi/impgraph.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/vcl/source/gdi/impgraph.cxx b/vcl/source/gdi/impgraph.cxx
index a8f1d0c7301b..deb143effa8b 100644
--- a/vcl/source/gdi/impgraph.cxx
+++ b/vcl/source/gdi/impgraph.cxx
@@ -943,6 +943,7 @@ sal_uLong ImpGraphic::ImplGetAnimationLoopCount() const
void ImpGraphic::ImplSetContext( GraphicReader* pReader )
{
+ assert(!mpContext);
mpContext = pReader;
mbDummyContext = false;
}