Note that the second chunk this patch is mangled - the change
should go on the Get_Class not the Coverage_Index call.

diff -uprw /home/otaylor/cvs/gnome2/pango-head/pango/opentype/ftxgpos.c ./opentype-munge/ftxgpos.c
--- /home/otaylor/cvs/gnome2/pango-head/pango/opentype/ftxgpos.c	2003-07-25 12:59:44.000000000 -0400
+++ ./opentype-munge/ftxgpos.c	2003-07-25 12:55:55.000000000 -0400
@@ -1676,11 +1683,11 @@
 
     error = Get_Class( &ppf2->ClassDef1, in->string[first_pos],
                        &cl1, NULL );
-    if ( error )
+    if ( error && error != TTO_Err_Not_Covered )
       return error;
     error = Get_Class( &ppf2->ClassDef2, in->string[in->pos],
                        &cl2, NULL );
-    if ( error )
+    if ( error && error != TTO_Err_Not_Covered )
       return error;
 
     c1r = &ppf2->Class1Record[cl1];
@@ -4027,7 +4027,7 @@
              do any lookup at all.                                     */
 
     error = Coverage_Index( &cpf2->Coverage, in->string[in->pos], &index );
-    if ( error )
+    if ( error && error != TTO_Err_Not_Covered )
       goto End;
 
     error = Get_Class( &cpf2->ClassDef, in->string[in->pos],
@@ -5407,7 +5414,7 @@
 
     error = Get_Class( &ccpf2->InputClassDef, in->string[in->pos],
                        &input_classes[0], NULL );
-    if ( error )
+    if ( error && error != TTO_Err_Not_Covered )
       goto End1;
 
     cpcs = &ccpf2->ChainPosClassSet[input_classes[0]];
diff -uprw /home/otaylor/cvs/gnome2/pango-head/pango/opentype/ftxgsub.c ./opentype-munge/ftxgsub.c
--- /home/otaylor/cvs/gnome2/pango-head/pango/opentype/ftxgsub.c	2003-07-25 12:59:44.000000000 -0400
+++ ./opentype-munge/ftxgsub.c	2003-07-25 12:55:55.000000000 -0400
@@ -2197,7 +2197,7 @@
 
     error = Get_Class( &csf2->ClassDef, in->string[in->pos],
                        &classes[0], NULL );
-    if ( error )
+    if ( error && error != TTO_Err_Not_Covered )
       goto End;
     known_classes = 0;
 
@@ -3584,7 +3546,7 @@
 
     error = Get_Class( &ccsf2->InputClassDef, in->string[in->pos],
                        &input_classes[0], NULL );
-    if ( error )
+    if ( error && error != TTO_Err_Not_Covered )
       goto End1;
 
     cscs = &ccsf2->ChainSubClassSet[input_classes[0]];