Fix mixup of bool and ternary value

Not currently a problem, but could be with stricter bool behavior under
stdbool or C++.

Reviewed-by: Andres Freund <andres@anarazel.de>

src/backend/access/gin/ginscan.c

@@ -147,7 +147,7 @@ ginFillScanKey(GinScanOpaque so, OffsetNumber attnum,
 	key->nuserentries = nUserQueryValues;
 
 	key->scanEntry = (GinScanEntry *) palloc(sizeof(GinScanEntry) * nQueryValues);
-	key->entryRes = (bool *) palloc0(sizeof(bool) * nQueryValues);
+	key->entryRes = (GinTernaryValue *) palloc0(sizeof(GinTernaryValue) * nQueryValues);
 
 	key->query = query;
 	key->queryValues = queryValues;

src/include/access/gin_private.h

@@ -281,7 +281,7 @@ typedef struct GinScanKeyData
 	int			nadditional;
 
 	/* array of check flags, reported to consistentFn */
-	bool	   *entryRes;
+	GinTernaryValue *entryRes;
 	bool		(*boolConsistentFn) (GinScanKey key);
 	GinTernaryValue (*triConsistentFn) (GinScanKey key);
 	FmgrInfo   *consistentFmgrInfo;