Made glfwGetX11Monitor return output, not CRTC.

include/GLFW/glfw3native.h

@@ -158,11 +158,11 @@ GLFWAPI id glfwGetNSGLContext(GLFWwindow* window);
  */
 GLFWAPI Display* glfwGetX11Display(void);
 
-/*! @brief Returns the `RRCrtc` of the specified monitor.
- *  @return The the `RRCrtc` of the specified monitor.
+/*! @brief Returns the `RROutput` of the specified monitor.
+ *  @return The the `RROutput` of the specified monitor.
  *  @ingroup native
  */
-GLFWAPI RRCrtc glfwGetX11Monitor(GLFWmonitor* monitor);
+GLFWAPI RROutput glfwGetX11Monitor(GLFWmonitor* monitor);
 
 /*! @brief Returns the `Window` of the specified window.
  *  @return The `Window` of the specified window.

src/x11_monitor.c

@@ -449,10 +449,10 @@ void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp)
 //////                        GLFW native API                       //////
 //////////////////////////////////////////////////////////////////////////
 
-GLFWAPI RRCrtc glfwGetX11Monitor(GLFWmonitor* handle)
+GLFWAPI RROutput glfwGetX11Monitor(GLFWmonitor* handle)
 {
     _GLFWmonitor* monitor = (_GLFWmonitor*) handle;
     _GLFW_REQUIRE_INIT_OR_RETURN(None);
-    return monitor->x11.crtc;
+    return monitor->x11.output;
 }