Use static_assert instead of custom ASSERT_STATIC

src/hb-ot-map.cc

diff --git a/src/hb-ot-map.cc b/src/hb-ot-map.cc
index 5764a11..0922d75 100644
--- a/src/hb-ot-map.cc
+++ b/src/hb-ot-map.cc
@@ -138,7 +138,7 @@
 			      const int    *coords,
 			      unsigned int  num_coords)
 {
-  ASSERT_STATIC (!(HB_GLYPH_FLAG_DEFINED & (HB_GLYPH_FLAG_DEFINED + 1)));
+  static_assert ((!(HB_GLYPH_FLAG_DEFINED & (HB_GLYPH_FLAG_DEFINED + 1))), "");
   unsigned int global_bit_mask = HB_GLYPH_FLAG_DEFINED + 1;
   unsigned int global_bit_shift = _hb_popcount32 (HB_GLYPH_FLAG_DEFINED);