Index: layer.h
===================================================================
--- layer.h	(revision 18003)
+++ layer.h	(revision 18004)
@@ -118,7 +118,7 @@
 		struct { /* A real board layer */
 			pcb_layergrp_id_t grp;         /* the group this layer is in (cross-reference) */
 			pcb_bool vis;                  /* visible flag */
-			const char *color;             /* color */
+			char *color;                   /* strdup'd */
 			int no_drc;                    /* whether to ignore the layer when checking the design rules */
 			const char *cookie;            /* for UI layers: registration cookie; NULL for unused UI layers */
 		} real;