--- ray/src/common/cone.c	1992/09/06 11:53:47	2.2
+++ ray/src/common/cone.c	1992/11/19 21:32:48	2.4
@@ -48,7 +48,6 @@ getcone(o, getxf)			/* get cone structure */
 register OBJREC  *o;
 int  getxf;
 {
-	extern double  sqrt();
 	int  sgn0, sgn1;
 	register CONE  *co;
 
@@ -155,11 +154,11 @@ OBJREC  *o;
 {
 	register CONE  *co = (CONE *)o->os;
 
-	if (o->os == NULL)
+	if (co == NULL)
 		return;
 	if (co->tm != NULL)
 		free((char *)co->tm);
-	free(o->os);
+	free((char *)co);
 	o->os = NULL;
 }
 
@@ -167,7 +166,6 @@ OBJREC  *o;
 conexform(co)			/* get cone transformation matrix */
 register CONE  *co;
 {
-	extern double  sqrt();
 	MAT4  m4;
 	register double  d;
 	register int  i;