Fixed PSP rendering

src/display/texture.c

@@ -170,6 +170,7 @@ void textureBind(const texture_t *texture) {
   #if DISPLAY_SDL2
     glEnable(GL_TEXTURE_2D);
     glBindTexture(GL_TEXTURE_2D, texture->id);
+    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
   #endif
   TEXTURE_BOUND = texture;
 }