[add size_t to FFI usable types, print better error message in 'lookupCType'
John Meacham <john@repetae.net>**20070530001322] hunk ./DataConstructors.hs 405
+    (tc_CSize, "size_t"),
hunk ./DataConstructors.hs 415
-    f _ = fail "lookupCType: Not C Type"
+    f e = fail $ "lookupCType: Not C Type: " ++ pprint e