Fix build after removing JsonbValue.estSize field.

Oops, I didn't realize that contrib/hstore refers to jsonb stuff.

contrib/hstore/hstore_io.c

@@ -1384,26 +1384,21 @@ hstore_to_jsonb(PG_FUNCTION_ARGS)
 		JsonbValue	key,
 					val;
 
-		key.estSize = sizeof(JEntry);
 		key.type = jbvString;
 		key.val.string.len = HS_KEYLEN(entries, i);
 		key.val.string.val = pnstrdup(HS_KEY(entries, base, i), key.val.string.len);
-		key.estSize += key.val.string.len;
 
 		res = pushJsonbValue(&state, WJB_KEY, &key);
 
 		if (HS_VALISNULL(entries, i))
 		{
-			val.estSize = sizeof(JEntry);
 			val.type = jbvNull;
 		}
 		else
 		{
-			val.estSize = sizeof(JEntry);
 			val.type = jbvString;
 			val.val.string.len = HS_VALLEN(entries, i);
 			val.val.string.val = pnstrdup(HS_VAL(entries, base, i), val.val.string.len);
-			val.estSize += val.val.string.len;
 		}
 		res = pushJsonbValue(&state, WJB_VALUE, &val);
 	}
@@ -1436,16 +1431,12 @@ hstore_to_jsonb_loose(PG_FUNCTION_ARGS)
 		JsonbValue	key,
 					val;
 
-		key.estSize = sizeof(JEntry);
 		key.type = jbvString;
 		key.val.string.len = HS_KEYLEN(entries, i);
 		key.val.string.val = pnstrdup(HS_KEY(entries, base, i), key.val.string.len);
-		key.estSize += key.val.string.len;
 
 		res = pushJsonbValue(&state, WJB_KEY, &key);
 
-		val.estSize = sizeof(JEntry);
-
 		if (HS_VALISNULL(entries, i))
 		{
 			val.type = jbvNull;
@@ -1511,15 +1502,12 @@ hstore_to_jsonb_loose(PG_FUNCTION_ARGS)
 				val.val.numeric = DatumGetNumeric(
 												  DirectFunctionCall3(numeric_in, CStringGetDatum(tmp.data), 0, -1));
 
-				val.estSize += VARSIZE_ANY(val.val.numeric) +sizeof(JEntry);
 			}
 			else
 			{
-				val.estSize = sizeof(JEntry);
 				val.type = jbvString;
 				val.val.string.len = HS_VALLEN(entries, i);
 				val.val.string.val = pnstrdup(HS_VAL(entries, base, i), val.val.string.len);
-				val.estSize += val.val.string.len;
 			}
 		}
 		res = pushJsonbValue(&state, WJB_VALUE, &val);