Add -c to dmenu, but as a noop

To support other scripts.

modules/dwm/dmenu-center-noop.patch

@@ -0,0 +1,14 @@
+diff --git a/dmenu.c b/dmenu.c
+
+index fd49549..e9e2648 100644
+--- a/dmenu.c
++++ b/dmenu.c
+@@ -757,6 +757,8 @@ main(int argc, char *argv[])
+ 			colors[SchemeSel][ColFg] = argv[++i];
+ 		else if (!strcmp(argv[i], "-w"))   /* embedding window id */
+ 			embed = argv[++i];
++		else if (!strcmp(argv[i], "-c"))
++			continue;
+ 		else
+ 			usage();
+ 

modules/dwm/packages.nix

@@ -3,7 +3,12 @@
     { pkgs, ... }:
     {
       environment.systemPackages = with pkgs; [
-        dmenu
+        (dmenu.override {
+          patches = [
+            ./dmenu-center-noop.patch
+          ];
+        })
+
         dmenu-bluetooth
         dunst
         networkmanager_dmenu