Handle strndup in freebsd in the same way it is handled on other...

src/platform-macos.cc

Index: src/platform-macos.cc
===================================================================
--- src/platform-macos.cc	(revision 1141)
+++ src/platform-macos.cc	(working copy)
@@ -199,12 +199,14 @@
   // Stupid implementation of strndup since macos isn't born with
   // one.
   size_t len = strlen(str);
-  if (len <= n)
+  if (len <= n) {
     return StrDup(str);
+  }
   char* result = new char[n+1];
   size_t i;
-  for (i = 0; i <= n; i++)
+  for (i = 0; i <= n; i++) {
     result[i] = str[i];
+  }
   result[i] = '\0';
   return result;
 }