Some micro-optimizations.

- [AV]sitA: Compute loading progress percentage without converting to float. Remove some 'else' clauses, adding 'return' where appropriate. That required moving the retrieval of the next notecard line near the top. A block has been left indented for clarity, and will be unindented in the next commit.
- [AV]prop: Remove some 'else' clauses, adding 'return' where appropriate. A block has been left indented for clarity, and will be unindented in the next commit.
- [AV]Xcite!: Change (string)llList2Integer to llList2String, after verifying that the elements in the list are always integers, and therefore this can't cause problems.
- [AV]root-RLV-extra: Remove unused event.
- [AV]faces: Change llListReplaceList with a replacement of [] to llDeleteSubList, to save one argument. Remove unnecessary 'else'.
- [AV]sequence: Comment out unused condition. It would be removed by the optimizer anyway, but this will hopefully help with clarity.
- AVpos-shifter: Change var++ to ++var (the optimizer would also do this anyway).

AVsitter2/Plugins/AVsequence/[AV]sequence.lsl

@@ -433,9 +433,11 @@ state running
 
     changed(integer change)
     {
+        /*
         if (change & CHANGED_LINK)
         {
         }
+        */
         if (change & CHANGED_INVENTORY)
         {
             if (llGetInventoryKey(notecard_name) != notecard_key || get_number_of_scripts() != llGetListLength(SITTERS))