Fixed gxm render flags

src/render/vitagxm/SDL_render_vita_gxm.c

@@ -106,7 +106,7 @@ SDL_RenderDriver VITA_GXM_RenderDriver = {
     .CreateRenderer = VITA_GXM_CreateRenderer,
     .info = {
         .name = "VITA gxm",
-        .flags = SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC,
+        .flags = SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_TARGETTEXTURE,
         .num_texture_formats = 1,
         .texture_formats = {
             [0] = SDL_PIXELFORMAT_ABGR8888, // TODO: support more formats? ARGB8888 should be enough?