[matrix] Prefer a return parameter for _compute_determinant().

Returning a double tends to be slightly more efficient than passing a
pointer to fill, and is a lot easier to read.

1 files changed, 1 insertions, 7 deletions

diff --git a/src/cairo-pen.c b/src/cairo-pen.c
index 4a882d56..425b3b96 100644
--- a/src/cairo-pen.c
+++ b/src/cairo-pen.c
@@ -53,17 +53,11 @@ _cairo_pen_init (cairo_pen_t	*pen,
 {
     int i;
     int reflect;
-    double  det;
 
     pen->radius = radius;
     pen->tolerance = tolerance;
 
-    _cairo_matrix_compute_determinant (ctm, &det);
-    if (det >= 0) {
-	reflect = 0;
-    } else {
-	reflect = 1;
-    }
+    reflect = _cairo_matrix_compute_determinant (ctm) < 0.;
 
     pen->num_vertices = _cairo_pen_vertices_needed (tolerance,
 						    radius,