Made glfwSetCursorPos fail silently if lacking focus.

src/init.c

@@ -228,8 +228,6 @@ GLFWAPI const char* glfwErrorString(int error)
             return "The requested OpenGL version is unavailable";
         case GLFW_PLATFORM_ERROR:
             return "A platform-specific error occurred";
-        case GLFW_WINDOW_NOT_FOCUSED:
-            return "The specified window is not focused";
         case GLFW_FORMAT_UNAVAILABLE:
             return "The requested format is unavailable";
     }

src/input.c

@@ -408,10 +408,7 @@ GLFWAPI void glfwSetCursorPos(GLFWwindow handle, int xpos, int ypos)
     }
 
     if (_glfwLibrary.focusedWindow != window)
-    {
-        _glfwSetError(GLFW_WINDOW_NOT_FOCUSED, NULL);
         return;
-    }
 
     // Don't do anything if the cursor position did not change
     if (xpos == window->cursorPosX && ypos == window->cursorPosY)