Index: libmpdemux/ebml.c
===================================================================
--- libmpdemux/ebml.c	(revision 32033)
+++ libmpdemux/ebml.c	(working copy)
@@ -136,7 +136,7 @@
     int l;
 
     len = ebml_read_length(s, &l);
-    if (len == EBML_UINT_INVALID || len < 1 || len > 8)
+    if (len == EBML_UINT_INVALID || len > 8)
         return EBML_UINT_INVALID;
     if (length)
         *length = len + l;
@@ -157,11 +157,14 @@
     int l;
 
     len = ebml_read_length(s, &l);
-    if (len == EBML_UINT_INVALID || len < 1 || len > 8)
+    if (len == EBML_UINT_INVALID || len > 8)
         return EBML_INT_INVALID;
     if (length)
         *length = len + l;
 
+    if (len == 0)
+        return 0;
+
     len--;
     l = stream_read_char(s);
     if (l & 0x80)