another we_dont_have() due to disk read error.

the idea is to help recovering faster from db corruption problems.

libtorrent/include/libtorrent/torrent.hpp

@@ -529,6 +529,8 @@ namespace libtorrent
 		// only once per piece
 		void we_have(int index, boost::uint32_t post_flags);
 
+		void we_dont_have(int index);
+
 		int num_have() const
 		{
 			return has_picker()

libtorrent/src/peer_connection.cpp

@@ -4571,6 +4571,11 @@ namespace libtorrent
 		
         if (ret <= 0)
 		{
+			if (t->has_picker() && t->have_piece(j.piece) ) {
+				printf("on_disk_read_complete: read error (database corrupt?) - setting we_dont_have(%d)\n", j.piece);
+				t->we_dont_have(j.piece);
+			}
+
 			if (ret == -3)
 			{
 #if defined TORRENT_VERBOSE_LOGGING

libtorrent/src/torrent.cpp

@@ -944,7 +944,7 @@ namespace libtorrent
 			pieces->push_back( std::string(j.buffer, ret));
 		} else {
 			printf("piece read error (database corrupt?) - setting we_dont_have(%d)\n", j.piece);
-			m_picker->we_dont_have(j.piece);
+			we_dont_have(j.piece);
 		}
 		(*reqs)--;
 
@@ -3113,6 +3113,16 @@ namespace libtorrent
 		m_picker->we_have(index, post_flags);
 	}
 
+	void torrent::we_dont_have(int index)
+	{
+		TORRENT_ASSERT(m_ses.is_network_thread());
+		// update m_file_progress
+		TORRENT_ASSERT(m_picker);
+
+		m_picker->we_dont_have(index);
+	}
+
+
 	void torrent::piece_passed(int index, boost::uint32_t post_flags)
 	{
 //		INVARIANT_CHECK;