SDL2: Fix for missing movement updates when losing focus.

lost_focus_move_event.patch

--- /tmp/tmp.4049.39	2013-03-01 11:53:56.199276885 -0800
+++ src/events/SDL_mouse.c	2013-03-01 11:52:47.390674778 -0800
@@ -33,6 +33,8 @@
 /* The mouse state */
 static SDL_Mouse SDL_mouse;
 
+static int
+SDL_PrivateSendMouseMotion(SDL_Window * window, int relative, int x, int y);
 
 /* Public functions */
 int
@@ -154,8 +156,9 @@
 #endif
         if (window == mouse->focus) {
 #ifdef DEBUG_MOUSE
-            printf("Mouse left window, synthesizing focus lost event\n");
+            printf("Mouse left window, synthesizing move & focus lost event\n");
 #endif
+            SDL_PrivateSendMouseMotion(window, 0, x, y);
             SDL_SetMouseFocus(NULL);
         }
         return SDL_FALSE;
@@ -176,18 +179,25 @@
 int
 SDL_SendMouseMotion(SDL_Window * window, int relative, int x, int y)
 {
-    SDL_Mouse *mouse = SDL_GetMouse();
-    int posted;
-    int xrel;
-    int yrel;
-    int x_max = 0, y_max = 0;
-
     if (window && !relative) {
+        SDL_Mouse *mouse = SDL_GetMouse();
         if (!SDL_UpdateMouseFocus(window, x, y, mouse->buttonstate)) {
             return 0;
         }
     }
 
+    return SDL_PrivateSendMouseMotion(window, relative, x, y);
+}
+
+static int
+SDL_PrivateSendMouseMotion(SDL_Window * window, int relative, int x, int y)
+{
+    SDL_Mouse *mouse = SDL_GetMouse();
+    int posted;
+    int xrel;
+    int yrel;
+    int x_max = 0, y_max = 0;
+
     /* relative motion is calculated regarding the system cursor last position */
     if (relative) {
         xrel = x;