lib: fix sparse shadowed variable warning

pos is always set before being used, no need to declare a
second one inside the if() block.

lib/prio_heap.c:34:7: warning: symbol 'pos' shadows an earlier one
lib/prio_heap.c:30:6: originally declared here

Signed-off-by: Harvey Harrison <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

lib/prio_heap.c

···
 
 	if (heap->size < heap->max) {
 		/* Heap insertion */
-		int pos = heap->size++;
+		pos = heap->size++;
 		while (pos > 0 && heap->gt(p, ptrs[(pos-1)/2])) {
 			ptrs[pos] = ptrs[(pos-1)/2];
 			pos = (pos-1)/2;