Split the redraw effect to own function

src/events/SDL_mouse.c

@@ -1599,6 +1599,26 @@ SDL_Cursor *SDL_CreateSystemCursor(SDL_SystemCursor id)
     return cursor;
 }
 
+void SDL_RedrawCursor(void)
+{
+    SDL_Mouse *mouse = SDL_GetMouse();
+    SDL_Cursor *cursor;
+
+    if (mouse->focus) {
+        cursor = mouse->cur_cursor;
+    } else {
+        cursor = mouse->def_cursor;
+    }
+
+    if (mouse->focus && (!mouse->cursor_visible || (mouse->relative_mode && mouse->relative_mode_hide_cursor))) {
+        cursor = NULL;
+    }
+
+    if (mouse->ShowCursor) {
+        mouse->ShowCursor(cursor);
+    }
+}
+
 /* SDL_SetCursor(NULL) can be used to force the cursor redraw,
    if this is desired for any reason.  This is used when setting
    the video mode and when the SDL window gains the mouse focus.
@@ -1629,19 +1649,7 @@ bool SDL_SetCursor(SDL_Cursor *cursor)
         mouse->cur_cursor = cursor;
     }
 
-    if (mouse->focus) {
-        cursor = mouse->cur_cursor;
-    } else {
-        cursor = mouse->def_cursor;
-    }
-
-    if (mouse->focus && (!mouse->cursor_visible || (mouse->relative_mode && mouse->relative_mode_hide_cursor))) {
-        cursor = NULL;
-    }
-
-    if (mouse->ShowCursor) {
-        mouse->ShowCursor(cursor);
-    }
+    SDL_RedrawCursor();
 
     return true;
 }

src/events/SDL_mouse_c.h

@@ -175,6 +175,9 @@ extern void SDL_SetMouseName(SDL_MouseID mouseID, const char *name);
 // Get the mouse state structure
 extern SDL_Mouse *SDL_GetMouse(void);
 
+// Set the default mouse cursor
+extern void SDL_RedrawCursor(void);
+
 // Set the default mouse cursor
 extern void SDL_SetDefaultCursor(SDL_Cursor *cursor);