In "main()", the "strncat()" is given the size equal to the destination
size. Thus, in worst case scenario, the string which needs to be
suffixed, will be truncated. Fix the warning.
Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>
Reviewed-by: Federico Vaga <federico.vaga@cern.ch>