fixed the lvalue check in the assignment list in read.c

touched up fnblk handling in comp.c
updated more code in hcl-x.c

lib/hcl.h

@@ -2548,6 +2548,10 @@ HCL_EXPORT int hcl_decode (
 	hcl_oow_t          end
 );
 
+HCL_EXPORT void hcl_clearcode (
+	hcl_t* hcl
+);
+
 #if defined(HCL_HAVE_INLINE)
 static HCL_INLINE hcl_code_t* hcl_getcode (hcl_t* hcl) { return &hcl->code; }
 static HCL_INLINE hcl_oob_t* hcl_getbcptr (hcl_t* hcl) { return hcl->code.bc.ptr; }