Created attachment 250756 [details]
Removes the never reachable if-else condition

In file :
https://git.gnome.org/browse/libxml2/tree/tree.c
Function : xmlDOMWrapNsMapAddItem

At line : 7846
  if ((position != -1) && (position != 0))
	return(NULL);
i.e if value of position can either be 1 or 0.

Line: 7882
   if (map->first == NULL) {
       ----Some COde ----
   } else if (position == -1) {
       ---Some COde---
   } else if (position == 0) {
       ----Some Code ----
   } else
	return(NULL);

In above if-else statements if map-first is not NULL then:
one of the else-if condition will be executed as value of position can either be 1 or 0.
So, the final else condition will never be executed.

Patch for fix is attached.