test: Re-enable pass-through

The pass-through test was not updated to the current test conventions
and was not enabled in the Makefiles.

test/Makefile.sources

@@ -228,6 +228,7 @@ test_sources = \
 	paint-with-alpha.c				\
 	partial-clip-text.c				\
 	partial-coverage.c				\
+	pass-through.c					\
 	path-append.c					\
 	path-stroke-twice.c				\
 	path-precision.c				\

test/pass-through.c

@@ -25,15 +25,6 @@
 
 #include "cairo-test.h"
 
-static cairo_test_draw_function_t draw;
-
-static const cairo_test_t test = {
-    "pass-through",
-    "Tests pixel values",
-    16, 256,
-    draw
-};
-
 static cairo_test_status_t
 draw (cairo_t *cr, int width, int height)
 {
@@ -92,8 +83,9 @@ draw (cairo_t *cr, int width, int height)
     return CAIRO_TEST_SUCCESS;
 }
 
-int
-main (void)
-{
-    return cairo_test (&test);
-}
+CAIRO_TEST (pass_through,
+	    "tests pixel values",
+	    "color", /* keywords */
+	    NULL, /* requirements */
+	    16, 256,
+	    NULL, draw)