i965: Add missing braces around if-statement.

Fixes a performance problem caused by commit b639ed2f.

Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90895

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

@@ -339,12 +339,13 @@ is_color_fast_clear_compatible(struct brw_context *brw,
                                mesa_format format,
                                const union gl_color_union *color)
 {
-   if (_mesa_is_format_integer_color(format))
+   if (_mesa_is_format_integer_color(format)) {
       if (brw->gen >= 8) {
          perf_debug("Integer fast clear not enabled for (%s)",
                     _mesa_get_format_name(format));
       }
       return false;
+   }
 
    for (int i = 0; i < 4; i++) {
       if (color->f[i] != 0.0 && color->f[i] != 1.0 &&