Various Windows and VC++ 2010 fixes.

src/gamma.c

@@ -57,7 +57,7 @@ GLFWAPI void glfwSetGammaFormula(float gamma, float blacklevel, float gain)
         float value = (float) i / ((float) (size - 1));
 
         // Apply gamma
-        value = pow(value, 1.f / gamma) * 65535.f + 0.5f;
+        value = (float) pow(value, 1.f / gamma) * 65535.f + 0.5f;
 
         // Apply gain
         value = gain * (value - 32767.5f) + 32767.5f;

src/win32_platform.h

@@ -34,13 +34,16 @@
 
 // We don't need all the fancy stuff
 #define NOMINMAX
-#define WIN32_LEAN_AND_MEAN
 #define VC_EXTRALEAN
 
+#ifndef WIN32_LEAN_AND_MEAN
+ #define WIN32_LEAN_AND_MEAN
+#endif
+
 #include <windows.h>
 #include <mmsystem.h>
 
-#include "../../include/GL/wglext.h"
+#include "../include/GL/wglext.h"
 
 
 //========================================================================

src/win32_window.c

@@ -1556,7 +1556,8 @@ void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
 
 void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height)
 {
-    int bpp, newMode = 0, refresh;
+    //int bpp, refresh;
+    int newMode = 0;
     GLboolean sizeChanged = GL_FALSE;
 
     if (window->mode == GLFW_FULLSCREEN)
@@ -1647,7 +1648,7 @@ void _glfwPlatformRefreshWindowParams(void)
 {
     PIXELFORMATDESCRIPTOR pfd;
     DEVMODE dm;
-    int pixelFormat, mode;
+    int pixelFormat;
 
     _GLFWwindow* window = _glfwLibrary.currentWindow;