Fix nbtree.h dedup state comment.
Oversight in commit
@@ -758,7 +758,7 @@ typedef struct BTDedupStateData
* will not become posting list tuples do not appear in the array (they
* are implicitly unchanged by deduplication pass).
*/
- int nintervals; /* current size of intervals array */
+ int nintervals; /* current number of intervals in array */
BTDedupInterval intervals[MaxIndexTuplesPerPage];
} BTDedupStateData;
