--- ray/src/rt/x11.c	1992/09/16 16:15:42	2.8
+++ ray/src/rt/x11.c	1993/03/02 10:56:33	2.10
@@ -26,7 +26,7 @@ static char SCCSid[] = "$SunId$ LBL";
 #define GAMMA		2.2		/* default exponent correction */
 
 #define MINWIDTH	(32*COMCW)	/* minimum graphics window width */
-#define MINHEIGHT	MINWIDTH	/* minimum graphics window height */
+#define MINHEIGHT	(MINWIDTH/2)	/* minimum graphics window height */
 
 #define BORWIDTH	5		/* border width */
 #define COMHEIGHT	(COMLH*COMCH)	/* command line height (pixels) */
@@ -321,14 +321,12 @@ int  *xp, *yp;
 	if (c_last > c_first)			/* key pressed */
 		return(x11_getc());
 						/* button pressed */
-	if (levptr(XButtonPressedEvent)->button & Button1)
+	if (levptr(XButtonPressedEvent)->button == Button1)
 		return(MB1);
-	if (levptr(XButtonPressedEvent)->button & Button2)
+	if (levptr(XButtonPressedEvent)->button == Button2)
 		return(MB2);
-	if (levptr(XButtonPressedEvent)->button & Button3)
+	if (levptr(XButtonPressedEvent)->button == Button3)
 		return(MB3);
-	if (levptr(XButtonPressedEvent)->button & (Button4|Button5))
-		return(MB1);
 	return(ABORT);
 }