ICU-12734 ICU4C API, add missing U_HIDE_INTERNAL_API

X-SVN-Rev: 39333

diff --git a/icu4c/source/common/unicode/umachine.h b/icu4c/source/common/unicode/umachine.h
index 48596584763a79b32afc08643b97e998941f0543..51581c7dcdc187120105481dbbcbab1a06aaf044 100644 (file)
--- a/icu4c/source/common/unicode/umachine.h
+++ b/icu4c/source/common/unicode/umachine.h
@@ -51,6 +51,7 @@
  */
 #include <stddef.h>
 
+#ifndef U_HIDE_INTERNAL_API
 /*
  *  U_USE_CHAR16_T
  *     When defined, force use of char16_t for UChar.
@@ -71,6 +72,7 @@
 #include <uchar.h>
 #endif
 #endif
+#endif  /* U_HIDE_INTERNAL_API */
 
 /*==========================================================================*/
 /* For C wrappers, we use the symbol U_STABLE.                                */