Fix various comparing functions

contrib/tsearch2/dict.c

@@ -92,7 +92,9 @@ reset_dict(void)
 static int
 comparedict(const void *a, const void *b)
 {
-	return ((DictInfo *) a)->dict_id - ((DictInfo *) b)->dict_id;
+	if ( ((DictInfo *) a)->dict_id == ((DictInfo *) b)->dict_id )
+		return 0;
+	return ( ((DictInfo *) a)->dict_id < ((DictInfo *) b)->dict_id ) ? -1 : 1;
 }
 
 DictInfo *

contrib/tsearch2/rank.c

@@ -386,7 +386,7 @@ static int
 compareDocR(const void *a, const void *b)
 {
 	if (((DocRepresentation *) a)->pos == ((DocRepresentation *) b)->pos)
-		return 1;
+		return 0;
 	return (((DocRepresentation *) a)->pos > ((DocRepresentation *) b)->pos) ? 1 : -1;
 }
 
@@ -654,7 +654,7 @@ static int
 compareDocWord(const void *a, const void *b)
 {
 	if (((DocWord *) a)->pos == ((DocWord *) b)->pos)
-		return 1;
+		return 0;
 	return (((DocWord *) a)->pos > ((DocWord *) b)->pos) ? 1 : -1;
 }
 

contrib/tsearch2/ts_cfg.c

@@ -186,7 +186,9 @@ reset_cfg(void)
 static int
 comparecfg(const void *a, const void *b)
 {
-	return ((TSCfgInfo *) a)->id - ((TSCfgInfo *) b)->id;
+	if ( ((TSCfgInfo *) a)->id == ((TSCfgInfo *) b)->id )
+		return 0;
+	return ( ((TSCfgInfo *) a)->id < ((TSCfgInfo *) b)->id ) ? -1 : 1;
 }
 
 TSCfgInfo *

contrib/tsearch2/tsvector.c

@@ -51,7 +51,7 @@ static int
 comparePos(const void *a, const void *b)
 {
 	if (((WordEntryPos *) a)->pos == ((WordEntryPos *) b)->pos)
-		return 1;
+		return 0;
 	return (((WordEntryPos *) a)->pos > ((WordEntryPos *) b)->pos) ? 1 : -1;
 }
 

contrib/tsearch2/wparser.c

@@ -93,7 +93,9 @@ reset_prs(void)
 static int
 compareprs(const void *a, const void *b)
 {
-	return ((WParserInfo *) a)->prs_id - ((WParserInfo *) b)->prs_id;
+	if ( ((WParserInfo *) a)->prs_id == ((WParserInfo *) b)->prs_id )
+		return 0;
+	return ( ((WParserInfo *) a)->prs_id < ((WParserInfo *) b)->prs_id ) ? -1 : 1;
 }
 
 WParserInfo *