Fix conversion warnings

[nacho]

several warnings are spotted by this compilation flag, i.e:

../../dcvtest/glew.cpp: In function ‘const GLubyte* glewGetErrorString(GLenum)’:
../../dcvtest/glew.cpp:13535:76: warning: conversion to ‘int’ from ‘long unsigned int’ may alter its value [-Wconversion]
const int max_error = sizeof(_glewErrorString)/sizeof(_glewErrorString) - 1;
^
../../dcvtest/glew.cpp: In function ‘const GLubyte glewGetString(GLenum)’:
../../dcvtest/glew.cpp:13549:67: warning: conversion to ‘int’ from ‘long unsigned int’ may alter its value [-Wconversion]
const int max_string = sizeof(_glewString)/sizeof(*_glewString) - 1;

[nigels-com]

Can you mention which particular platform and/or compiler is emitting these?
I tried some gccs on Ubuntu 12.04, 13.04, 13.10...

• Nigel

[nacho]

This is on fedora 20 using gcc (g++), see also that I am setting the -Wconversion flag

[nigels-com]

Confirming this on Fedora 20, building like so:
make CC=g++
And with -Wconversion applied.

[nigels-com]

I pushed a fix for this into the master branch, just now.