RSPRO: don't use "default 1" for protocol version

I suspect there may be some bugs in the handling of DEFAULT values
in asn1c (or maybe I don't understand them fully?), so let's simply
make the version field a normal ASN.1 field.

Change-Id: I08077e715a901dfa5193855be7040d550f6fc2e8
diff --git a/asn1/RSPRO.asn b/asn1/RSPRO.asn
index 8772ee7..45ef70c 100644
--- a/asn1/RSPRO.asn
+++ b/asn1/RSPRO.asn
@@ -270,7 +270,7 @@
 }
 
 RsproPDU ::= SEQUENCE {
-	version		[0] INTEGER(0..32) DEFAULT 1,
+	version		[0] INTEGER(0..32),
 	tag		[1] OperationTag,
 	msg		[2] RsproPDUchoice
 }