From cf15ce518535837fa993ce9a6c631e6c5755165a Mon Sep 17 00:00:00 2001
From: clifford <clifford@b57f626f-c46c-0410-a088-ec61d464b74c>
Date: Wed, 24 Jun 2009 17:40:19 +0000
Subject: Clifford Wolf: 	Fixed CSG product normalization

git-svn-id: http://svn.clifford.at/openscad/trunk@17 b57f626f-c46c-0410-a088-ec61d464b74c

diff --git a/csgterm.cc b/csgterm.cc
index 359d3b5..826ec44 100644
--- a/csgterm.cc
+++ b/csgterm.cc
@@ -69,11 +69,13 @@ CSGTerm *CSGTerm::normalize()
 		y->unlink();
 	}
 
-	do {
+	while (1) {
 		t2 = t1->normalize_tail();
 		t1->unlink();
+		if (t1 == t2)
+			break;
 		t1 = t2;
-	} while (t1 != t2);
+	}
 
 	return t1;
 }
diff --git a/mainwin.cc b/mainwin.cc
index 86c37ed..352c62d 100644
--- a/mainwin.cc
+++ b/mainwin.cc
@@ -265,12 +265,13 @@ void MainWindow::actionCompile()
 
 	root_norm_term = root_raw_term->link();
 
-	CSGTerm *n;
-	do {
-		n = root_norm_term->normalize();
+	while (1) {
+		CSGTerm *n = root_norm_term->normalize();
 		root_norm_term->unlink();
+		if (root_norm_term == n)
+			break;
 		root_norm_term = n;
-	} while (root_norm_term != n);
+	}
 
 	if (!root_norm_term) {
 		console->append("Compilation failed!");
-- 
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