Fix libpq example return values

doc/src/sgml/libpq.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/libpq.sgml,v 1.36 2000/03/31 03:27:40 thomas Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/libpq.sgml,v 1.37 2000/04/25 16:39:07 momjian Exp $
 -->
 
  <chapter id="libpq-chapter">
@@ -2031,6 +2031,8 @@ main()
     PQfinish(conn);
 
     /* fclose(debug); */
+    return 0;
+
 }
 </programlisting>
 </para>
@@ -2152,6 +2154,7 @@ main()
     /* close the connection to the database and cleanup */
     PQfinish(conn);
 
+    return 0;
 }
 </programlisting>
 </para>
@@ -2334,6 +2337,7 @@ main()
     /* close the connection to the database and cleanup */
     PQfinish(conn);
 
+    return 0;
 }
 </programlisting>
 </para>

src/test/examples/testlibpq.c

@@ -130,5 +130,5 @@ main()
 	fclose(debug);
 #endif	 /* DEBUG */
 
-	exit(0);
+	return 0;
 }

src/test/examples/testlo.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/test/examples/testlo.c,v 1.14 2000/01/26 05:58:49 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/test/examples/testlo.c,v 1.15 2000/04/25 16:39:07 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -248,5 +248,5 @@ main(int argc, char **argv)
 	res = PQexec(conn, "end");
 	PQclear(res);
 	PQfinish(conn);
-	exit(0);
+	return 0;
 }

src/test/examples/testlo2.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/test/examples/Attic/testlo2.c,v 1.13 2000/01/26 05:58:49 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/test/examples/Attic/testlo2.c,v 1.14 2000/04/25 16:39:07 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -241,5 +241,5 @@ main(int argc, char **argv)
 	res = PQexec(conn, "end");
 	PQclear(res);
 	PQfinish(conn);
-	exit(0);
+	return 0;
 }