Using UpnpReadHttpGet to download large files causes the application to

crash. This happens when the file being downloaded exceeds the device
memory - entirely possible when transferring video files.
The programmatic cause is that the logic implemented in the function
http_ReadHttpGet (which UpnpReadHttpGet calls) reads the entire file
into memory. The fix modifies the existing logic to discard data after
it's been read; there's no reason to keep it around since the caller
of UpnpReadHttpGet already has a copy of it.

This issue exists in 1.6.6 as well as the latest sources.

Patch submitted by Chandra (inactiveneurons).

upnp/src/inc/httpparser.h

@@ -193,7 +193,8 @@ typedef struct // http_message_t
 
 	// private fields
 	membuffer msg;		// entire raw message
-	char *urlbuf;	// storage for url string
+        char *urlbuf;	// storage for url string
+        size_t entity_offset;
 } http_message_t;
 
 typedef struct // http_parser_t