Use a consistent output type for "valcomp" in struct2hdl.m (bug #67217).

* struct2hdl.m (valcomp): Use false instead of 0 as return value.

Author: Fernando Alvarruiz

scripts/plot/util/struct2hdl.m

@@ -770,7 +770,7 @@ function setprops (s, h, p, hilev)
   if (isfloat (x) && isscalar (x))
     out = any (x == hdls);
   else
-    out = 0;
+    out = false;
   endif
 
 endfunction