Assigning string literals to char* has been deprecated since C++98 and
is now an error in Visual Studio. Also, a goto which skips variable
nationalizations is an error now.

std::min/max are defined in <algorithm>

Bug swiftshader:121

Change-Id: Ic087706de810e68849eb021c1e0a9d2f2a960260
Reviewed-on: https://swiftshader-review.googlesource.com/c/21988Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>