Merge pull request #2186 from WalterBright/stdint2

core.stdc.stdint: fix mistake with int_fast16_t
merged-on-behalf-of: Brad Roberts <braddr@users.noreply.github.com>

Author: dlang-bot

src/core/stdc/stdint.d

@@ -125,8 +125,8 @@ else version (OSX)
 
     alias int_fast8_t   = byte;  ///
     alias uint_fast8_t  = ubyte; ///
-    alias int_fast16_t  = int;   ///
-    alias uint_fast16_t = uint;  ///
+    alias int_fast16_t  = short;   ///
+    alias uint_fast16_t = ushort;  ///
     alias int_fast32_t  = int;   ///
     alias uint_fast32_t = uint;  ///
     alias int_fast64_t  = long;  ///