glsl: Silence unused parameter warning

glsl/lower_shared_reference.cpp: In member function ‘virtual void
{anonymous}::lower_shared_reference_visitor::insert_buffer_access(void*,
ir_dereference*, const glsl_type*, ir_rvalue*, unsigned int, int)’:

glsl/lower_shared_reference.cpp:244:58: warning: unused parameter
‘channel’ [-Wunused-parameter]
                                                      int channel)
                                                          ^~~~~~~

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
1 file changed