use 'fabs()'

src/ngmultidec.c

@@ -136,7 +136,7 @@ main (int argc, char **argv)
     exit(1);
   }
 
-  if ( (k<0.0?-k:k) >=1.0 ) {
+  if (fabs(k) >= 1.0) {
     fprintf(stderr,"Error: |k| must be less than 1.0\n");
     fflush(stderr);
     exit(1);

src/spicelib/parser/ptfuncs.c

@@ -25,7 +25,7 @@ double PTfudge_factor;
 double
 PTabs(double arg)
 {
-    return arg >= 0.0 ? arg : -arg;
+    return fabs(arg);
 }
 
 double