avoid using declaration for type in header file

git-svn-id: svn://svn.code.sf.net/p/fuego/code/trunk@1949 2e953b5c-c64d-0410-be54-f773e93e544c
Fix doxygen warnings

git-svn-id: svn://svn.code.sf.net/p/fuego/code/trunk@1950 2e953b5c-c64d-0410-be54-f773e93e544c
Fix doxygen warnings

git-svn-id: svn://svn.code.sf.net/p/fuego/code/trunk@1951 2e953b5c-c64d-0410-be54-f773e93e544c