--- parse_input.c.orig	2020-01-12 14:16:26 UTC
+++ parse_input.c
@@ -525,6 +525,7 @@ int read_nec_SC(char *s)     /* SC -> continuation of 
 int read_nec_SC(char *s)     /* SC -> continuation of SM, SP, or SC */
 {
    Surface *su;
+   Surface *suLast;
    int ns;
    Point p3;
    int n;
@@ -573,7 +574,7 @@ int read_nec_SC(char *s)     /* SC -> continuation of 
       case 'C':
          n=sscanf(s,"SC%*i%d%g%g%g%g%g%g",&ns,&su->p2.x,&su->p2.y,&su->p2.z,&su->p3.x,&su->p3.y,&su->p3.z);
          if (n!=7 && n!=4) return Err_scan;
-         Surface *suLast=surfaces+(numsurfaces-2);
+         suLast=surfaces+(numsurfaces-2);
          su->p0=suLast->p3;
          su->p1=suLast->p2;
          updateextremes(&su->p2);