Correct wxDataViewColumn::AppendXXXColumn() return value in case of failure.

Don't return invalid column pointer if it was freed because actually appending
it to the control failed.

Fixes corresponding Coverity warnings.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75950 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix fall back to default resolution in wxOSX printing code.

The code was written to use the default resolution if getting it from the
printer failed but only handled failure of PMPrinterGetOutputResolution() and
not of PMSessionGetCurrentPrinter() itself.

Use default resolution if obtaining it failed for any reason (alternative
could be to return error if obtaining it failed for any return...).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75951 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix socket leak in Accept() in case of error.o

We leaked a socket descriptor if creating the accepted socket object failed.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75952 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
No real changes, just use smart pointers in GIF decoding code.

Use wxScopedArray to make the code much shorter and guarantee that it doesn't
leak memory.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75953 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix memory leak on error return from wxMsgCatalogFile::FillHash().

Use wxScopedPtr to make memory management simpler and to ensure that all
pointers allocated in this function are deleted: this wasn't the case when we
returned false earlier due to the MO file being invalid.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75954 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix memory leak in case of error in wxOSX graphics code.

Delete the pointer before returning from the function if we don't pass its
ownership to CGDataProviderCreateWithData().

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75955 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix memory leak on error return in wxOSX wxDisplay code.

Use wxScopedArray to ensure that memory is freed, even if wxCHECK_MSG()
condition fails.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75956 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Ensure we don't read invalid memory in wxOSX wxDisplay code.

Replace wxASSERT() with wxCHECK_MSG() to ensure that we don't read beyond the
end of the array even if we are given an invalid index.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75957 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix uninitialized variable use in wxPropertyGrid code.

wxPGProperty::GetItemAtY() uses its input/output "nextItem" parameter, so it
must be initialized before calling it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75958 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix memory leak in wxRibbonToolBar in case of error.

Use wxScopedPtr to ensure the tool is not leaked, even if we fail to insert
it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75959 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775