ngspiceMODULEsetup.c.xml, allocate instance node too

If an instance node is "optional" then we might need to
 allocate it ourself just the same as so called "internal" nodes.
Notably in bsim6.va the optional thermal node might be needed
 when shmod is used, even if unconnected.

src/spicelib/devices/adms/admst/ngspiceMODULEsetup.c.xml

@@ -139,7 +139,7 @@ int $(module)setup (SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt, int *
       {
         int error;
         CKTnode *tmp;
-<admst:for-each select="node[location='internal']">
+<admst:for-each select="node[location!='ground']">
 <admst:variable name="info" select="no info"/>
 <admst:for-each select="attribute[name='info']">
   <admst:value-of select="value"/>