SDL: Fixed Doxygen comments

From 629c694bd65fb974bfb9877df3ea5ee57897f3ab Mon Sep 17 00:00:00 2001
From: Henry Wilson <[EMAIL REDACTED]>
Date: Tue, 9 Apr 2024 13:10:48 +0100
Subject: [PATCH] Fixed Doxygen comments

Added '*' to the start of Doxygen comments for SDL_FlipSurface and SDL_DuplicateSurface so they highlight properly in IDEs
---
 include/SDL3/SDL_surface.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/SDL3/SDL_surface.h b/include/SDL3/SDL_surface.h
index b106ea71c16f5..f261722499ed8 100644
--- a/include/SDL3/SDL_surface.h
+++ b/include/SDL3/SDL_surface.h
@@ -637,7 +637,7 @@ extern DECLSPEC SDL_bool SDLCALL SDL_SetSurfaceClipRect(SDL_Surface *surface, co
  */
 extern DECLSPEC int SDLCALL SDL_GetSurfaceClipRect(SDL_Surface *surface, SDL_Rect *rect);
 
-/*
+/**
  * Flip a surface vertically or horizontally.
  *
  * \param surface the surface to flip
@@ -649,7 +649,7 @@ extern DECLSPEC int SDLCALL SDL_GetSurfaceClipRect(SDL_Surface *surface, SDL_Rec
  */
 extern DECLSPEC int SDLCALL SDL_FlipSurface(SDL_Surface *surface, SDL_FlipMode flip);
 
-/*
+/**
  * Creates a new surface identical to the existing surface.
  *
  * The returned surface should be freed with SDL_DestroySurface().