fix %DDf buffer off by one, implement %DDg, make %DDe print at least 3 decimals

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6072 4407c894-4637-0410-b4f5-ada5f102cad1
Fix typo

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6073 4407c894-4637-0410-b4f5-ada5f102cad1
allow DFP to be disabled via __EXPERIMENTAL_DFP, also, implement arbitary bitness printing %I28d %I128u etc now possible

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6074 4407c894-4637-0410-b4f5-ada5f102cad1
fix octet string bad offset calculation with something simpler

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6075 4407c894-4637-0410-b4f5-ada5f102cad1
get rid of unneeded variables

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6076 4407c894-4637-0410-b4f5-ada5f102cad1