Added explicit include of locale.h for when --disable-nls is configured

git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@3301 67ed7778-7388-44ab-90cf-0a291f65f57c

frontends/command-line/main.c

@@ -7,6 +7,7 @@
 #include <stdarg.h>
 #include <string.h>
 #include <unistd.h>
+#include <locale.h>
 
 #ifndef WIN32
 #include <signal.h>