Reset input slave eof flag on seek.

(cherry picked from commit 4ce86c99)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

src/input/input.c

@@ -2475,6 +2475,10 @@ static void SlaveSeek( input_thread_t *p_input )
             msg_Err( p_input, "seek failed for slave %d -> EOF", i );
             in->b_eof = true;
         }
+        else
+        {
+            in->b_eof = false;
+        }
     }
 }