devices/asrc, cleanup #5/9, drop explicit NULL comparsion

src/spicelib/devices/asrc/asrcacld.c

@@ -28,8 +28,8 @@ ASRCacLoad(GENmodel *inModel, CKTcircuit *ckt)
 
     NG_IGNORE(ckt);
 
-    for (; model != NULL; model = model->ASRCnextModel) {
-        for (here = model->ASRCinstances; here != NULL;
+    for (; model; model = model->ASRCnextModel) {
+        for (here = model->ASRCinstances; here;
              here = here->ASRCnextInstance) {
 
             difference = (here->ASRCtemp + here->ASRCdtemp) - 300.15;

src/spicelib/devices/asrc/asrcconv.c

@@ -21,8 +21,8 @@ ASRCconvTest(GENmodel *inModel, CKTcircuit *ckt)
     double tol;
     double rhs;
 
-    for (; model != NULL; model = model->ASRCnextModel) {
-        for (here = model->ASRCinstances; here != NULL;
+    for (; model; model = model->ASRCnextModel) {
+        for (here = model->ASRCinstances; here;
              here = here->ASRCnextInstance) {
 
             i = here->ASRCtree->numVars;

src/spicelib/devices/asrc/asrcfbr.c

@@ -19,8 +19,8 @@ ASRCfindBr(CKTcircuit *ckt, GENmodel *inputModel, IFuid name)
     int error;
     CKTnode *tmp;
 
-    for (; model != NULL; model = model->ASRCnextModel) {
-        for (here = model->ASRCinstances; here != NULL;
+    for (; model; model = model->ASRCnextModel) {
+        for (here = model->ASRCinstances; here;
              here = here->ASRCnextInstance) {
             if (here->ASRCname == name) {
                 if (here->ASRCbranch == 0) {

src/spicelib/devices/asrc/asrcload.c

@@ -28,8 +28,8 @@ ASRCload(GENmodel *inModel, CKTcircuit *ckt)
     double difference;
     double factor;
 
-    for (; model != NULL; model = model->ASRCnextModel) {
-        for (here = model->ASRCinstances; here != NULL;
+    for (; model; model = model->ASRCnextModel) {
+        for (here = model->ASRCinstances; here;
              here=here->ASRCnextInstance)
         {
 

src/spicelib/devices/asrc/asrcpzld.c

@@ -27,8 +27,8 @@ ASRCpzLoad(GENmodel *inModel, CKTcircuit *ckt, SPcomplex *s)
 
     NG_IGNORE(s);
 
-    for (; model != NULL; model = model->ASRCnextModel) {
-        for (here = model->ASRCinstances; here != NULL;
+    for (; model; model = model->ASRCnextModel) {
+        for (here = model->ASRCinstances; here;
              here = here->ASRCnextInstance)
         {
 

src/spicelib/devices/asrc/asrcset.c

@@ -25,8 +25,8 @@ ASRCsetup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt, int *states)
 
     NG_IGNORE(states);
 
-    for (; model != NULL; model = model->ASRCnextModel) {
-        for (here = model->ASRCinstances; here != NULL;
+    for (; model; model = model->ASRCnextModel) {
+        for (here = model->ASRCinstances; here;
              here=here->ASRCnextInstance) {
 
             if (!here->ASRCtc1Given) here->ASRCtc1 = 0.0;
@@ -143,10 +143,10 @@ ASRCunsetup(
     ASRCmodel *model = (ASRCmodel *) inModel;
     ASRCinstance *here;
 
-    for (; model != NULL;
+    for (; model;
          model = model->ASRCnextModel)
     {
-        for (here = model->ASRCinstances; here != NULL;
+        for (here = model->ASRCinstances; here;
              here = here->ASRCnextInstance)
         {
             if (here->ASRCbranch) {

src/spicelib/devices/asrc/asrctemp.c

@@ -15,8 +15,8 @@ ASRCtemp(GENmodel *inModel, CKTcircuit *ckt)
     ASRCmodel *model = (ASRCmodel *) inModel;
     ASRCinstance *here;
 
-    for (; model != NULL; model = model->ASRCnextModel) {
-        for (here = model->ASRCinstances; here != NULL;
+    for (; model; model = model->ASRCnextModel) {
+        for (here = model->ASRCinstances; here;
              here = here->ASRCnextInstance) {
 
             /* Default Value Processing for Source Instance */