Moved X11 gamma ramp termination to gamma module.

src/x11_gamma.c

@@ -90,6 +90,17 @@ void _glfwInitGammaRamp(void)
 }
 
 
+//========================================================================
+// Restore original gamma ramp if necessary
+//========================================================================
+
+void _glfwTerminateGammaRamp(void)
+{
+    if (_glfwLibrary.originalRampSize && _glfwLibrary.rampChanged)
+        _glfwPlatformSetGammaRamp(&_glfwLibrary.originalRamp);
+}
+
+
 //////////////////////////////////////////////////////////////////////////
 //////                       GLFW platform API                      //////
 //////////////////////////////////////////////////////////////////////////

src/x11_init.c

@@ -659,9 +659,6 @@ static Cursor createNULLCursor(void)
 
 static void terminateDisplay(void)
 {
-    if (_glfwLibrary.originalRampSize && _glfwLibrary.rampChanged)
-        _glfwPlatformSetGammaRamp(&_glfwLibrary.originalRamp);
-
     if (_glfwLibrary.X11.display)
     {
         XCloseDisplay(_glfwLibrary.X11.display);
@@ -713,6 +710,8 @@ int _glfwPlatformTerminate(void)
         _glfwLibrary.X11.cursor = (Cursor) 0;
     }
 
+    _glfwTerminateGammaRamp();
+
     terminateDisplay();
 
     _glfwTerminateJoysticks();

src/x11_platform.h

@@ -285,6 +285,7 @@ void _glfwInitTimer(void);
 
 // Gamma
 void _glfwInitGammaRamp(void);
+void _glfwTerminateGammaRamp(void);
 
 // Fullscreen support
 int  _glfwGetClosestVideoMode(int* width, int* height, int* rate);