[cairo-error] Clean up all the warnings and missing _cairo_error() calls.

Every time we assign or return a hard-coded error status wrap that value
with a call to _cairo_error(). So the idiom becomes:
    status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
or
    return _cairo_error (CAIRO_STATUS_INVALID_DASH);

This ensures that a breakpoint placed on _cairo_error() will trigger
immediately cairo detects the error.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cairo-hull.c b/src/cairo-hull.c
index f5d05e471..9eed671f5 100644
--- a/src/cairo-hull.c
+++ b/src/cairo-hull.c
@@ -64,7 +64,7 @@ _cairo_hull_create (cairo_pen_vertex_t *vertices, int num_vertices)
 
     hull = _cairo_malloc_ab (num_vertices, sizeof (cairo_hull_t));
     if (hull == NULL) {
-	_cairo_error (CAIRO_STATUS_NO_MEMORY);
+	_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
 	return NULL;
     }