s2n_server_recv_alpn: Remove no-op size check
s2n_server_recv_alpn: Remove no-op size check

sizeof(conn->application_protocol) - 1 = 255, so comparing a uinit8_t is a
noop. This fails on on gcc 4.1 with -Wextra as "comparison is always false due
to limited range of data type"

alexeblee/s2n,bpdavidson/s2n,bpdavidson/s2n,raycoll/s2n,barnabycolby/s2n,Wiladams/s2n,raycoll/s2n,gibson-compsci/s2n,jldodds/s2n,PKRoma/s2n,SomeoneWeird/s2n,jldodds/s2n,wcs1only/s2n,raycoll/s2n,wcs1only/s2n,raycoll/s2n,regehr/s2n,jldodds/s2n,alexeblee/s2n,awslabs/s2n,pascal-cuoq/s2n,colmmacc/s2n,jqk6/s2n,gibson-compsci/s2n,PKRoma/s2n,0-wiz-0/s2n,alexeblee/s2n,PKRoma/s2n,wcs1only/s2n,jldodds/s2n,bpdavidson/s2n,gibson-compsci/s2n,wcs1only/s2n,bpdavidson/s2n,wcs1only/s2n,PKRoma/s2n,jfigus/s2n,PKRoma/s2n,colmmacc/s2n,awslabs/s2n,awslabs/s2n,PKRoma/s2n,wcs1only/s2n,kedars/s2n,colmmacc/s2n,PKRoma/s2n,PKRoma/s2n,wcs1only/s2n,awslabs/s2n,wcs1only/s2n,bpdavidson/s2n,hechunwen/s2n,raycoll/s2n,raycoll/s2n,alexeblee/s2n,awslabs/s2n,awslabs/s2n,colmmacc/s2n,colmmacc/s2n,bpdavidson/s2n,gibson-compsci/s2n,jldodds/s2n,gibson-compsci/s2n,alexeblee/s2n,colmmacc/s2n,gibson-compsci/s2n,alexeblee/s2n