--- FWF/src/converters/StrToPmap.c.orig	1998-11-09 00:22:54.000000000 +0100
+++ FWF/src/converters/StrToPmap.c	2023-03-12 08:38:29.924468000 +0100
@@ -140,9 +140,11 @@
       XrmValue value;
 
       xrm_name[0] = XrmStringToName ("pixmapFilePath");
-      xrm_name[1] = NULL;
+      xrm_name[1] = 0;  // Replaced NULL by 0.
+                        // XrmName/XrmQuark is of type int. M. Kraft 2023-03-12
       xrm_class[0] = XrmStringToClass ("PixmapFilePath");
-      xrm_class[1] = NULL;
+      xrm_class[1] = 0; // Replaced NULL by 0.
+                        // XrmName/XrmQuark is of type int. M. Kraft 2023-03-12
       if (!XrmGetDatabase(dpy)) {
 	(void) XGetDefault (dpy, "", "");
       }