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Fix call to stmt in loops

The first parameter of stmt if the break label, so it must be end,
and not begin how the code was doing.

--- a/stmt.c

+++ b/stmt.c

@@ -53,7 +53,7 @@

 	emitjump(cond, NULL);

 	emitbloop();

 	emitlabel(begin);

-	stmt(begin, end, lswitch);

+	stmt(end, begin, lswitch);

 	emitlabel(cond);

 	emitjump(begin, np);

 	emiteloop();

@@ -80,7 +80,7 @@

 	emitjump(cond, NULL);

 	emitbloop();

 	emitlabel(begin);

-	stmt(begin, end, lswitch);

+	stmt(end, begin, lswitch);

 	if (einc)

 		emitexp(einc);

 	emitlabel(cond);

@@ -98,7 +98,7 @@

 	expect(DO);

 	emitbloop();

 	emitlabel(begin);

-	stmt(begin, end, lswitch);

+	stmt(end, begin, lswitch);

 	expect(WHILE);

 	emitjump(begin, condition());

 	emiteloop();