std::ostream may not have a default constructor on Windows so we need
to supply a NULL buffer and then change the buffer to ours.
Index: src/StoreEntryStream.h
===================================================================
RCS file: /cvsroot/squid/squid3/src/StoreEntryStream.h,v
retrieving revision 1.4
diff -u -r1.4 StoreEntryStream.h
--- src/StoreEntryStream.h	7 Aug 2007 20:02:51 -0000	1.4
+++ src/StoreEntryStream.h	13 Aug 2007 16:41:26 -0000
@@ -116,7 +116,11 @@
 
 public:
     /* create a stream for writing text etc into theEntry */
-    StoreEntryStream(StoreEntry *entry): theBuffer(entry) { this->init(&theBuffer); }
+    // See http://www.codecomments.com/archive292-2005-2-396222.html
+    StoreEntryStream(StoreEntry *entry): std::ostream(0), theBuffer(entry) {
+        rdbuf(&theBuffer); // set the buffer to now-initialized theBuffer
+        clear(); //clear badbit set by calling init(0)
+    }
 
 private:
     StoreEntryStreamBuf theBuffer;