--- blt-2.4z.orig/src/bltGrMarker.c
+++ blt-2.4z/src/bltGrMarker.c
@@ -1061,10 +1061,12 @@
     Graph *graphPtr;
     Extents2D *extsPtr;
 {
+/*
     assert(extsPtr->right >= extsPtr->left);
     assert(extsPtr->bottom >= extsPtr->top);
     assert(graphPtr->right >= graphPtr->left);
     assert(graphPtr->bottom >= graphPtr->top);
+*/
 
     return (((double)graphPtr->right < extsPtr->left) ||
 	    ((double)graphPtr->bottom < extsPtr->top) ||