# HG changeset patch
# User Thinker K.F. Li <thinker@branda.to>
# Date 1261714624 -28800
# Node ID b51ae415f459333e2401a84c09f284bcc7460e68
# Parent  5711059b9642348f872d7bfa3318b4373b86f7b3
Use coord_is_root() to indicate the root coord

diff -r 5711059b9642 -r b51ae415f459 src/coord.c
--- a/src/coord.c	Fri Dec 25 12:11:20 2009 +0800
+++ b/src/coord.c	Fri Dec 25 12:17:04 2009 +0800
@@ -63,7 +63,7 @@
  * matrix as aggregated matrix. 
  */
 static void compute_transform_function(coord_t *visit) {
-    if(visit->parent)
+    if(!coord_is_root(visit))
 	mul_matrix(visit->parent->aggr_matrix,
 		   visit->matrix, visit->aggr_matrix);
     else
@@ -83,7 +83,7 @@
     co_aix cache_p_matrix[6];
     co_aix cache_scale_x, cache_scale_y;
     
-    if(visit->parent) {
+    if(!coord_is_root(visit)) {
 	p_matrix = coord_get_aggr_matrix(visit->parent);
 	cache_scale_x =
 	    sqrtf(p_matrix[0] * p_matrix[0] + p_matrix[3] * p_matrix[3]);