[9front] [PATCH] 9/pc/trap.c: Make case fallthrough

[Christos Margiolis <christos@margiolis.net>]

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There is no need to have 2 cases doing the exact same thing.

Christos

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from postmaster@4ess:
The following attachment had content that we can't
prove to be harmless.  To avoid possible automatic
execution, we changed the content headers.
The original header was:

	Content-Type: text/x-diff; charset=us-ascii
	Content-Disposition: attachment; filename="9trap_fallthrough.diff"

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diff e2a8d3493ab0fdc345b6513a53f30f2b4f36ed97 uncommitted
--- a/sys/src/9/pc/trap.c
+++ b/sys/src/9/pc/trap.c
@@ -39,14 +39,10 @@
 	for(v = 0; v < 256; v++){
 		d1 = (vaddr & 0xFFFF0000)|SEGP;
 		switch(v){
-		case VectorBPT:
-			d1 |= SEGPL(3)|SEGIG;
-			break;
-
+		case VectorBPT: /* FALLTHROUGH */
 		case VectorSYSCALL:
 			d1 |= SEGPL(3)|SEGIG;
 			break;
-
 		default:
 			d1 |= SEGPL(0)|SEGIG;
 			break;