Vadim Zeitlin aa3acfdd15 Work around an apparent gcc optimizer bug in wxClassInfo ...

Rewrite a complex expression in wxClassInfo::IsKindOf() as several statements
to avoid what looks like a gcc optimizer bug as it was dereferencing
m_baseInfo1 pointer even when it was null.

The new version is not completely equivalent to the old one as it doesn't
check for info == NULL which is not really necessary, but this is just a side
effect and doesn't affect anything, the important change is avoiding doing
everything in a single expression.

Closes #17483.

2016-07-13 23:33:23 +02:00

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