--- ray/src/common/spec_rgb.c	2006/09/05 21:54:32	2.15
+++ ray/src/common/spec_rgb.c	2007/10/08 18:07:55	2.16
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: spec_rgb.c,v 2.15 2006/09/05 21:54:32 greg Exp $";
+static const char	RCSid[] = "$Id: spec_rgb.c,v 2.16 2007/10/08 18:07:55 greg Exp $";
 #endif
 /*
  * Convert colors and spectral ranges.
@@ -264,7 +264,7 @@ register RGBPRIMS  pr
 
 	if (pr == stdprims) {	/* can use xyz2rgbmat */
 		cpcolormat(mat, xyz2rgbmat);
-		return;
+		return(1);
 	}
 	if (CEQ(pr[WHT][CIEX],0.) | CEQ(pr[WHT][CIEY],0.))
 		return(0);
@@ -324,7 +324,7 @@ register RGBPRIMS  pr
 
 	if (pr == stdprims) {	/* can use rgb2xyzmat */
 		cpcolormat(mat, rgb2xyzmat);
-		return;
+		return(1);
 	}
 	if (CEQ(pr[WHT][CIEX],0.) | CEQ(pr[WHT][CIEY],0.))
 		return(0);
@@ -371,7 +371,7 @@ RGBPRIMS  pr2
 		mat[0][0] = mat[1][1] = mat[2][2] = 1.0;
 		mat[0][1] = mat[0][2] = mat[1][0] =
 		mat[1][2] = mat[2][0] = mat[2][1] = 0.0;
-		return;
+		return(1);
 	}
 	if (!comprgb2xyzmat(pr1toxyz, pr1))
 		return(0);