[PATCH] Add a spline to the degenerate-pen test case

[Carl Worth]

This was triggering an infinite loop (with 24.8 fixed-point) just before
the previous fix.

NOTE: I usually put bug demonstrations just before the fixes, but this
one was quite harsh---not only was cairo looping infinitely, but it
was appending to an array on each iteration---so not kind at all.
---
 test/degenerate-pen-ref.png |  Bin 278 -> 788 bytes
 test/degenerate-pen.c       |    3 +++
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/test/degenerate-pen-ref.png b/test/degenerate-pen-ref.png
index 0ad3325b58ccaa61bd2b9c845f5bc54b695a8fb6..539a32572287e58d3be7a78ab1b19ec240d5a74f 100644
GIT binary patch
delta 740
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delta 226
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diff --git a/test/degenerate-pen.c b/test/degenerate-pen.c
index c92a689..858949f 100644
--- a/test/degenerate-pen.c
+++ b/test/degenerate-pen.c
@@ -66,6 +66,7 @@ draw (cairo_t *cr, int width, int height)

     /* First compress the pen to a vertical line. */
     cairo_rectangle (cr, 0, 0, SIZE, SIZE);
+    cairo_curve_to (cr, SIZE / 2, 0, SIZE, SIZE / 2, SIZE, SIZE);
     cairo_save (cr);
     {
 	cairo_scale (cr, 0.000001, 1.0);
@@ -77,6 +78,7 @@ draw (cairo_t *cr, int width, int height)

     /* Then compress the pen to a horizontal line. */
     cairo_rectangle (cr, 0, 0, SIZE, SIZE);
+    cairo_curve_to (cr, SIZE / 2, 0, SIZE, SIZE / 2, SIZE, SIZE);
     cairo_save (cr);
     {
 	cairo_scale (cr, 1.0, 0.000001);
@@ -88,6 +90,7 @@ draw (cairo_t *cr, int width, int height)

     /* Finally a line at an angle. */
     cairo_rectangle (cr, 0, 0, SIZE, SIZE);
+    cairo_curve_to (cr, SIZE / 2, 0, SIZE, SIZE / 2, SIZE, SIZE);
     cairo_save (cr);
     {
 	cairo_rotate (cr, M_PI / 4.0);
--
1.5.3.2