Make gettext have its own definition.

package/gettext/gettext-error_print_progname.patch

@@ -0,0 +1,12 @@
+diff -ur gettext-0.14.6/gettext-tools/lib/error.h gettext-0.14.6-patched/gettext-tools/lib/error.h
+--- gettext-0.14.6/gettext-tools/lib/error.h	2005-05-20 16:03:42.000000000 -0500
++++ gettext-0.14.6-patched/gettext-tools/lib/error.h	2007-01-13 20:57:24.422168053 -0600
+@@ -50,7 +50,7 @@
+ /* If NULL, error will flush stdout, then print on stderr the program
+    name, a colon and a space.  Otherwise, error will call this
+    function without parameters instead.  */
+-extern DLL_VARIABLE void (*error_print_progname) (void);
++void (*error_print_progname) (void);
+ 
+ /* This variable is incremented each time `error' is called.  */
+ extern DLL_VARIABLE unsigned int error_message_count;