File xtermset-0.5.2-dash.patch of Package xtermset
--- src/xtermset.h
+++ src/xtermset.h
@@ -87,7 +87,7 @@
#define CHECK if(switches[0])
-#define CHECKFORCOMMAND if ((i + 1 < argc) && (strncmp(argv[i+1],"-",1)!=0)) { \
+#define CHECKFORCOMMAND if (i + 1 < argc) { \
strcpy(argptr->param,argv[++i]); \
}