devices/res/resnoise.c, cleanup using pow()

src/spicelib/devices/res/resnoise.c

@@ -103,9 +103,9 @@ RESnoise (int mode, int operation, GENmodel *genmodel, CKTcircuit *ckt,
                        printf("DC current in resistor %s: %e\n",inst->RESname, inst->REScurrent);
 #endif
                        
-                       noizDens[RESFLNOIZ] *= inst->RESm * model->RESfNcoef * exp(model->RESfNexp *
-                                              log(MAX(fabs(inst->REScurrent),
-                                              N_MINLOG))) / (inst->RESeffNoiseArea*pow(data->freq,model->RESef));
+                       noizDens[RESFLNOIZ] *= inst->RESm * model->RESfNcoef *
+                           pow(fabs(inst->REScurrent), model->RESfNexp)
+                           / (inst->RESeffNoiseArea * pow(data->freq, model->RESef));
                        lnNdens[RESFLNOIZ]   = log(MAX(noizDens[RESFLNOIZ],N_MINLOG));
 
                        noizDens[RESTOTNOIZ] = noizDens[RESTHNOIZ] + noizDens[RESFLNOIZ];