Resolve error on 32-bit *nixes with large file support

ERROR 2 (No such file or directory) in logout.cpp line 189 (backout) opening "/sbbs/node1/backout.dab"

src/sbbs3/logout.cpp

@@ -181,7 +181,7 @@ void sbbs_t::backout()
 	file_t f;
 
 	SAFEPRINTF(path,"%sbackout.dab",cfg.node_dir);
-	if(flength(path)<1L) {
+	if(flength(path) < 1) {
 		remove(path);
 		return; 
 	}