Don't ask about CD numbers if not installing from CD.

Approved by:	re

usr.sbin/sysinstall/index.c

@@ -695,6 +695,7 @@ index_extract(Device *dev, PkgNodePtr top, PkgNodePtr who, Boolean depended)
      * Prompt user if the package is not available on the current volume.
      */
 
+    if(mediaDevice->type == DEVICE_TYPE_CDROM) {
 	while (id->volume != dev->volume) {
 	    if (!msgYesNo("This is disc #%d.  Package %s is on disc #%d\n"
 			  "Would you like to switch discs now?\n", dev->volume,
@@ -707,6 +708,7 @@ index_extract(Device *dev, PkgNodePtr top, PkgNodePtr who, Boolean depended)
 		return DITEM_FAILURE;
 	    }
 	}
+    }
 
     if (id && id->deps && strlen(id->deps)) {
 	char t[2048 * 8], *cp, *cp2;