Coverity 1038522: fix memset inside cuda code.  Wrong size specified to memset.
Cuda make distcheck fix for cuda-ptxdump.h
Coverity 1038515: check function return

This is more cosmetic than useful but it is cleaner anyway.
Coverity: 1038139 suppress sanity check

The sanity check was really useless as the NULL value is checked in
the code flow.
Coverity 1038106: fix FP out-of-bond access

A cast during the reading of a configuration variable was invalid
because a 16 bit integer was cast to a 32 bit integer. The called
function is only setting the pointer value to 1 or 0 so there is
no real issue there.