Added a single SDL_LEAN_AND_MEAN define to turn on minimal SDL builds

Protected more code with #ifdefs to reduce the size of minimal shared library builds

src/render/software/SDL_rotate.c

@@ -30,6 +30,8 @@ Andreas Schiffler -- aschiffler at ferzkopp dot net
 */
 #include "../../SDL_internal.h"
 
+#if SDL_VIDEO_RENDER_SW && !SDL_RENDER_DISABLED
+
 #if defined(__WIN32__)
 #include "../../core/windows/SDL_windows.h"
 #endif
@@ -532,3 +534,5 @@ SDLgfx_rotateSurface(SDL_Surface * src, double angle, int centerx, int centery,
     /* Return rotated surface */
     return rz_dst;
 }
+
+#endif /* SDL_VIDEO_RENDER_SW && !SDL_RENDER_DISABLED */