List-0.4.3

Hi,

The change in package List-0.4.3 cause hexpat to fail.
(It works with List-0.4.2 without "mapMaybe")

C.

Resolving dependencies...
Downloading hexpat-0.20.2...
Configuring hexpat-0.20.2...
Building hexpat-0.20.2...
Preprocessing library hexpat-0.20.2...
[ 1 of 12] Compiling Text.XML.Expat.Internal.IO ( 
Text/XML/Expat/Internal/IO.hs, dist/build/Text/XML/Expat/Internal/IO.o )
[ 2 of 12] Compiling Text.XML.Expat.SAX ( Text/XML/Expat/SAX.hs, 
dist/build/Text/XML/Expat/SAX.o )
[ 3 of 12] Compiling Text.XML.Expat.Internal.NodeClass ( 
Text/XML/Expat/Internal/NodeClass.hs, 
dist/build/Text/XML/Expat/Internal/NodeClass.o )
[ 4 of 12] Compiling Text.XML.Expat.Internal.Qualified ( 
Text/XML/Expat/Internal/Qualified.hs, 
dist/build/Text/XML/Expat/Internal/Qualified.o )
[ 5 of 12] Compiling Text.XML.Expat.Internal.Namespaced ( 
Text/XML/Expat/Internal/Namespaced.hs, 
dist/build/Text/XML/Expat/Internal/Namespaced.o )
[ 6 of 12] Compiling Text.XML.Expat.Tree ( Text/XML/Expat/Tree.hs, 
dist/build/Text/XML/Expat/Tree.o )
[ 7 of 12] Compiling Text.XML.Expat.Cursor ( Text/XML/Expat/Cursor.hs, 
dist/build/Text/XML/Expat/Cursor.o )
[ 8 of 12] Compiling Text.XML.Expat.Internal.DocumentClass (