Tiny code cleanups
- gitlab CI: stop requiring Signed-off-by in commits
- allocateMemory: fix
-Wdiscarded-qualifierswarnings - TDFXDRIScreenInit: fix
-Wformatwarning - TDFXDRIScreenInit: Use
snprintfinstead ofsprintf
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-Wdiscarded-qualifiers warnings-Wformat warningsnprintf instead of sprintf