cmd: Fix rmdir error during recursive delete.

programs/cmd/builtins.c

@@ -1827,6 +1827,10 @@ void WCMD_remove_dir (WCHAR *command) {
         lpDir.pFrom  = thisArg;
         lpDir.fFlags = FOF_SILENT | FOF_NOCONFIRMATION | FOF_NOERRORUI;
         lpDir.wFunc  = FO_DELETE;
+
+        /* SHFileOperationW needs file list with a double null termination */
+        thisArg[lstrlenW(thisArg) + 1] = 0x00;
+
         if (SHFileOperationW(&lpDir)) WCMD_print_error ();
       }
     }

programs/cmd/tests/test_builtins.cmd

@@ -1163,7 +1163,7 @@ if not exist foo (
 )
 mkdir foo\bar\baz
 echo foo > foo\bar\brol
-rmdir /s /Q foo
+rmdir /s /Q foo 2>&1
 if not exist foo (
     echo recursive rmdir succeeded
 ) else (