few fixes for prototypes

src/include/ngspice/wallace.h

@@ -18,3 +18,5 @@ double NewWa(void); /* generate new pool, return outgauss[0] */
 #define GaussWa ((--variate_used)?(outgauss[variate_used]*ScaleGauss):NewWa())
 
 void PolarGauss(double* py1, double* py2);
+
+void destroy_wallace(void);

src/spicelib/devices/vdmos/vdmosload.c

@@ -14,8 +14,6 @@ VDMOS: 2018 Holger Vogt, 2020 Dietmar Warning
 #include "ngspice/sperror.h"
 #include "ngspice/suffix.h"
 
-void VDMOStempUpdate(VDMOSmodel *inModel, VDMOSinstance *here, double Temp, CKTcircuit *ckt);
-
 int
 VDMOSload(GENmodel *inModel, CKTcircuit *ckt)
 /* actually load the current value into the

src/xspice/icm/xtradev/pswitch/cfunc.mod

@@ -42,6 +42,7 @@ NON-STANDARD FEATURES
 
 /*=== INCLUDE FILES ====================*/
 
+#include <stdlib.h>
 #include <math.h>