5910 libnisdb won't build with modern GCC

@@ -22,10 +22,12 @@
 /*
  *      db_table.cc
  *
  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright 2015 RackTop Systems.
  */
 
 #include <stdio.h>
 #include <malloc.h>
 #include <string.h>

@@ -72,11 +74,11 @@
         }
         /* Set maxTimeT to ~0 of appropriate length */
         (void) memcpy(&maxTimeT, b, sizeof (time_t));
 
         if (maxTimeT < 1)
-                maxTimeT = ~(1<<((8*sizeof (maxTimeT))-1));
+                maxTimeT = ~(1L<<((8*sizeof (maxTimeT))-1));
 }
 #pragma init(__setMaxTimeT)
 }
 
 /* How much to grow table by */