st/mesa: don't use blit_copy_pixels if an occlusion query is active

CopyPixels, just as DrawPixels, should count the samples that passed
depth test.

Reviewed-by: Brian Paul <brianp@vmware.com>

src/mesa/state_tracker/st_cb_drawpixels.c

@@ -1365,7 +1365,8 @@ blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
        !ctx->VertexProgram.Enabled &&
        !ctx->Shader.CurrentFragmentProgram &&
        ctx->DrawBuffer->_NumColorDrawBuffers == 1 &&
-       !ctx->Query.CondRenderQuery) {
+       !ctx->Query.CondRenderQuery &&
+       !ctx->Query.CurrentOcclusionObject) {
       struct st_renderbuffer *rbRead, *rbDraw;
 
       /*