Declare put_msg() (boo#1225947)

--- fig2dev/dev/genpstex.c
+++ fig2dev/dev/genpstex.c	2024-07-02 06:04:04.359357084 +0000
@@ -53,6 +53,7 @@
 #include "object.h"
 #include "texfonts.h"
 #include "setfigfont.h"
+#include "messages.h"
 
 extern double rad2deg;