#840: bencode.c (and others) does not compile without libintl.h

configure.ac

@@ -116,6 +116,7 @@ if test "x$use_libnotify" = "xyes"; then
     AC_DEFINE([HAVE_LIBNOTIFY], 1)
 fi
 
+AC_CHECK_HEADERS([libintl.h])
 IT_PROG_INTLTOOL([0.23],[no-xml])
 GETTEXT_PACKAGE=transmission
 AC_SUBST(GETTEXT_PACKAGE)

libtransmission/utils.h

@@ -35,14 +35,14 @@ void tr_msgInit( void );
 #if !defined(_)
 #if defined(SYS_DARWIN)
   /*#include <CoreFoundation/CFBundle.h>
-  
   const char * tr_getMacLocalizedCString(CFStringRef string);
-  
   #define _(a) tr_getMacLocalizedCString(CFSTR(a))*/
   #define _(a) (a)
-#else
+#elif HAVE_LIBINTL
   #include <libintl.h>
   #define _(a) gettext (a)
+#else
+  #define _(a) (a)
 #endif
 #endif