opengl: texture: fix level parameter not being used when attaching to a framebuffer

Author: Adspartan

src/opengl/texture.cpp

@@ -49,7 +49,7 @@ namespace opengl
       gl.genTextures(1, &_id);
     }
 
-    gl.framebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, _id, 0);
+    gl.framebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, _id, level);
   }
 
   size_t texture::current_active_texture = -1;