Index: lib/type1/type1.c
===================================================================
--- a/lib/type1/type1.c
+++ b/lib/type1/type1.c	2012-01-03 07:13:54.054659023 -0300
@@ -1700,6 +1700,7 @@
   long pindex = 0;
   
   /* compute hinting for previous segment! */
+  if (ppoints == NULL) Error0i("RLineTo: No previous point!\n");
   FindStems( currx, curry, currx-ppoints[numppoints-2].x, curry-ppoints[numppoints-2].y, dx, dy);
 
   /* Allocate a new path point and pre-setup data */
@@ -1728,6 +1729,7 @@
   long pindex = 0;
   
   /* compute hinting for previous point! */
+  if (ppoints == NULL) Error0i("RRCurveTo: No previous point!\n");
   FindStems( currx, curry, currx-ppoints[numppoints-2].x, curry-ppoints[numppoints-2].y, dx1, dy1);
 
   /* Allocate three new path points and pre-setup data */
@@ -1903,6 +1905,7 @@
     FindStems( currx, curry, 0, 0, dx, dy);
   }
   else {
+    if (ppoints == NULL) Error0i("RMoveTo: No previous point!\n");
     FindStems( currx, curry, ppoints[numppoints-2].x, ppoints[numppoints-2].y, dx, dy);
   }