Printing sizes properly

Printing sizes properly

Sizes weren't getting printed properly
because of their type. In this case,
primarySize, for example, is an
unsigned char, so it gets printed as if
it were a character instead of a number.
Changing it to "primarySize + '0'" also
fails, because then the result of the
operator+ gets interpreted as an int.
To get it to work, I would need either
something like:
static_cast<char>(primarySize + '0')
or
static_cast<int>(primarySize)
I chose the latter.

Change-Id: Ib0718a7a86ef4314f886b653526240aa788fb3df
Reviewed-on: https://swiftshader-review.googlesource.com/3084
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>