Upgrade to SDL2.0.2 (8393682d9d96d1516831a397290cb34ceb82129f).

libs/SDL2/src/events/SDL_events.c

@@ -503,17 +503,28 @@ SDL_GetEventFilter(SDL_EventFilter * filter, void **userdata)
 void
 SDL_AddEventWatch(SDL_EventFilter filter, void *userdata)
 {
-    SDL_EventWatcher *watcher;
+    SDL_EventWatcher *watcher, *tail;
 
     watcher = (SDL_EventWatcher *)SDL_malloc(sizeof(*watcher));
     if (!watcher) {
         /* Uh oh... */
         return;
     }
+
+    /* create the watcher */
     watcher->callback = filter;
     watcher->userdata = userdata;
-    watcher->next = SDL_event_watchers;
-    SDL_event_watchers = watcher;
+    watcher->next = NULL;
+
+    /* add the watcher to the end of the list */
+    if (SDL_event_watchers) {
+        for (tail = SDL_event_watchers; tail->next; tail = tail->next) {
+            continue;
+        }
+        tail->next = watcher;
+    } else {
+        SDL_event_watchers = watcher;
+    }
 }
 
 /* FIXME: This is not thread-safe yet */

libs/SDL2/src/events/SDL_gesture.c

@@ -418,13 +418,8 @@ int SDL_GestureAddTouch(SDL_TouchID touchId)
 
     SDL_gestureTouch = gestureTouch;
 
-    SDL_gestureTouch[SDL_numGestureTouches].numDownFingers = 0;
+    SDL_zero(SDL_gestureTouch[SDL_numGestureTouches]);
     SDL_gestureTouch[SDL_numGestureTouches].id = touchId;
-
-    SDL_gestureTouch[SDL_numGestureTouches].numDollarTemplates = 0;
-
-    SDL_gestureTouch[SDL_numGestureTouches].recording = SDL_FALSE;
-
     SDL_numGestureTouches++;
     return 0;
 }

libs/SDL2/src/events/SDL_mouse.c

@@ -538,7 +538,10 @@ SDL_SetRelativeMouseMode(SDL_bool enabled)
     } else if (enabled && ShouldUseRelativeModeWarp(mouse)) {
         mouse->relative_mode_warp = SDL_TRUE;
     } else if (mouse->SetRelativeMouseMode(enabled) < 0) {
-        return -1;
+        if (enabled) {
+            // Fall back to warp mode if native relative mode failed
+            mouse->relative_mode_warp = SDL_TRUE;
+        }
     }
     mouse->relative_mode = enabled;