Sparse warnings from calls to max3() and max

[Larry Finger]

Hi,

Sparse has suddenly started issuing as many as 11 warnings of "expression using 
sizeof(void)" for each call to max3(). There are similar warnings for calls to 
max(), thus I think this is the origin of the problem. My sparse version is 
20180324-1.3-x86_64 installed in openSUSE Tumbleweed. My kernel is 4.19.0-rc6.

Thanks,

Larry