9abf541f7f breaks Windows builds due to missing ";"

Commit 9abf541f7f contains among other things

+int32_t
+monotime_coarse_diff_msec32_(const monotime_coarse_t *start,
+                             const monotime_coarse_t *end)
+{
+  return (int32_t)monotime_coarse_diff_msec(start, end)
+}

which is breaking our Windows compilation done with mingw-w64:

src/common/compat_time.c: In function 'monotime_coarse_diff_msec32_':
src/common/compat_time.c:634:1: error: expected ';' before '}' token
 }
 ^
Makefile:6263: recipe for target 'src/common/src_common_libor_testing_a-compat_time.o' failed

Trivial patch forthcoming...