Add script function addremovemapmask.

This function at same time add and remove some bits to map mask.

Example:
    // add 4 and remove 8
    addremovemapmask "test", 4, 8;

1 files changed, 5 insertions, 0 deletions

diff --git a/npc/functions/main.txt b/npc/functions/main.txt
index 08d2a5a3..225dcb22 100644
--- a/npc/functions/main.txt
+++ b/npc/functions/main.txt
@@ -45,3 +45,8 @@ function	script	adddefaultskills	{
 function	script	str	{
     return "" + getarg(0);
 }
+
+function	script	addremovemapmask	{
+    setmapmask getarg(0), (getmapmask(getarg(0)) | (getarg(1) + getarg(2))) ^ getarg(2);
+    return;
+}