i965/fs: Actually free program data on the error path.

We throw away the data generated during compilation on the success path,
so we really ought to on the failure path as well.  The caller has no
access to it anyway, so it's purely leaked.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>

src/mesa/drivers/dri/i965/brw_wm.c

@@ -181,8 +181,10 @@ bool do_wm_prog(struct brw_context *brw,
                                            &fp->program);
 
    program = brw_wm_fs_emit(brw, c, &fp->program, prog, &program_size);
-   if (program == NULL)
+   if (program == NULL) {
+      ralloc_free(c);
       return false;
+   }
 
    if (c->prog_data.total_scratch) {
       brw_get_scratch_bo(brw, &brw->wm.base.scratch_bo,