Fix parsing of empty parentheses

[Filyus]

This fix allows to parse () like (void) in the function parameters.
Another way to fix is to add void into following lines:

raylib/src/rlgl.h

Lines 594 to 595 in f622021

	RLAPI double rlGetCullDistanceNear(); // Get cull plane distance near
	RLAPI double rlGetCullDistanceFar(); // Get cull plane distance far

these lines are from the commit: 4b0e25d

[raysan5]

@Filyus Actually those functions need to be reviewed. C requires defining void if function should not receive parameters, empty parenthesis mean any number of input parameters.

[raysan5]

@Filyus I'm merging in case of that malformed side-case but it shouldn't be required.