vrend, allocal_texture: Set mip-map levels correctly in the texture's state

OpenGL defaults GL_TEXTURE_MIN_FILTER=GL_NEAREST_MIPMAP_LINEAR and
GL_TEXTURE_MAX_LEVEL=1000, and expects all these mip-map levels to be
defined. With glTexStorage this is set apropriately, but when the mip-map
levels are initialiazed manually, then the GL_TEXTURE_MAX_LEVEL must be set.

Tested-by: Jakob Bornecrantz <jakob@collabora.com>
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>

src/vrend_renderer.c

@@ -4932,6 +4932,11 @@ static int vrend_renderer_resource_allocate_texture(struct vrend_resource *gr,
       }
    }
 
+   if (!vrend_state.have_texture_storage) {
+      glTexParameteri(gr->target, GL_TEXTURE_BASE_LEVEL, 0);
+      glTexParameteri(gr->target, GL_TEXTURE_MAX_LEVEL, pr->last_level);
+   }
+
    gt->state.max_lod = -1;
    gt->cur_swizzle_r = gt->cur_swizzle_g = gt->cur_swizzle_b = gt->cur_swizzle_a = -1;
    return 0;