bitflags: Return 0 if param is nil #330
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This allows the user to opt out of passing flags into functions when there are none to specify. While libraries in statically typed languages expect users to pass in an explicit _NONE flag, Lua's ability to pass a variable number of parameters could easily be interpreted as explicitly not giving any flags when none are passed. Fixes lgi-devs#329
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This allows the user to opt out of passing flags into functions when there are none to specify. While libraries in statically typed languages expect users to pass in an explicit _NONE flag, Lua's ability to pass a variable number of parameters could easily be interpreted as explicitly not giving any flags when none are passed.
Fixes #329