Reset DevSwitch before returning

src/frontend/com_hardcopy.c

@@ -82,6 +82,7 @@ void com_hardcopy(wordlist *wl)
             fprintf(stderr,
                     "No parameters for hardcopy command, not previous plot:\n");
             fprintf(stderr, "    Command hardcopy cannot be executed\n ");
+            DevSwitch(NULL);
             return;
         }