Some compiler warnings for example:
uxa-glyphs.c:1045: warning: ‘width’ may be used uninitialized in this function
uxa-glyphs.c:1045: warning: ‘height’ may be used uninitialized in this function
uxa-render.c:1090: warning: ‘xDst_copy’ may be used uninitialized in this function
uxa-render.c:1090: warning: ‘yDst_copy’ may be used uninitialized in this function

I think these can never actually happen as the code protects use of
those uninitialized variables, but I'd not "argue" with the compiler.