fileobject.c: fix nasty bug; Makefile; turn on STROP and change lint flags.
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 52dd668..00020dc 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -440,7 +440,7 @@
 					resizestring(&result, len-1);
 				else {
 					object *v;
-					v == newsizedstringobject(s, len-1);
+					v = newsizedstringobject(s, len-1);
 					DECREF(result);
 					result = v;
 				}