i965: Make VS programs obey the shader_precompile driconf option.

Now that it's on by default, we may as well make it obey the flag,
for consistency's sake if nothing else.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>

src/mesa/drivers/dri/i965/brw_shader.cpp

@@ -70,7 +70,7 @@ brw_shader_precompile(struct gl_context *ctx, struct gl_shader_program *prog)
    if (brw->precompile && !brw_fs_precompile(ctx, prog))
       return false;
 
-   if (!brw_vs_precompile(ctx, prog))
+   if (brw->precompile && !brw_vs_precompile(ctx, prog))
       return false;
 
    return true;