Silence some compiler warnings related to ft2font #2991
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Clang warns that it gets a garbage value on Python 2, since mpl_PyFile_Dup expands to a function call that does not use &offset. It seems that the value is not used on Python 2 but it doesn't cost much to silence the warning.
Cast string constants explicitly to (char*) since the method calls aren't going to modify the strings.
mdboom
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Apr 20, 2014
Silence some compiler warnings related to ft2font
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