Documentation fix, set addr_extern len:(## 9)

doc/tblkch.tex

@@ -865,7 +865,7 @@ \section*{Introduction}
 The serialization of source and destination addresses is defined by the following TL-B scheme:
 \begin{verbatim}
 addr_none$00 = MsgAddressExt;
-addr_extern$01 len:(## 8) external_address:(len * Bit) 
+addr_extern$01 len:(## 9) external_address:(len * Bit)
              = MsgAddressExt;
 anycast_info$_ depth:(## 5) rewrite_pfx:(depth * Bit) = Anycast;
 addr_std$10 anycast:(Maybe Anycast) 

doc/tvm.tex

@@ -2274,7 +2274,7 @@ \section*{Introduction}
 The message and address manipulation primitives listed below serialize and deserialize values according to the following TL-B scheme (cf.~\ptref{sp:tlb.brief}):
 \begin{verbatim}
 addr_none$00 = MsgAddressExt;
-addr_extern$01 len:(## 8) external_address:(bits len) 
+addr_extern$01 len:(## 9) external_address:(bits len)
              = MsgAddressExt;
 anycast_info$_ depth:(#<= 30) { depth >= 1 }
    rewrite_pfx:(bits depth) = Anycast;