[PATCH] test: set correct reference image path.

If render result exactly match base_ref_png, we should
set the cmp_png_path to base_ref_png_path. For example, if there
are "reference/a8-clear.egl.argb32.ref.png" and
"reference/a8-clear.base.argb32.ref.png" in the reference directory.
The a8-clear.egl.argb32.ref.png doesn't exactly match the render
result, but a8-clear.base.argb32.ref.png does. Then we should set
the "REFERENCE:" to "./reference/a8-clear.base.argb32.ref.png" in
a8-clear.log. Or it will misguide users.
---
 test/cairo-test.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/test/cairo-test.c b/test/cairo-test.c
index 076b014..949e175 100644
--- a/test/cairo-test.c
+++ b/test/cairo-test.c
@@ -1242,6 +1242,7 @@ REPEAT:
 	    have_result = TRUE;
 	    cairo_surface_destroy (test_image);
 	    ret = CAIRO_TEST_SUCCESS;
+            cmp_png_path = base_ref_png_path;
 	    goto UNWIND_CAIRO;
 	}
 	if (cairo_test_files_equal (out_png_path, base_new_png_path)) {
-- 
1.7.9.5

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