fixed embarrassing bug in print_all_params - null check

in the wrong place - failed to check properly!

decs.c

@@ -882,15 +882,16 @@ static void print_all_params( d, s ) declnlist d; shapelist s;
 			} else
 			{
 				n = pl->item->num;
-				for( p = s->params; --n; p = p->next )
+				for( p = s->params; p != NULL && --n;
+					p = p->next )
+					;
+
+				if( p == NULL )
 				{
-					if( p == NULL )
-					{
-						fprintf( stderr,
+					fprintf( stderr,
 	"datadec: bad printitem in shape %s of type %s\n",
 	s->name, d->name );
-						exit(1);
-					}
+					exit(1);
 				}
 				print_param( s, p, d->Union );
 			}