wxFile::Open(write_append) will create file if it doesn't exist

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7551 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/file.tex

@@ -52,7 +52,8 @@ or test if it can be opened for writing with Access()}
 \twocolitem{{\bf wxFile::read\_write}}{Open file for reading and writing; can not be used with Access()}
 \twocolitem{{\bf wxFile::write\_append}}{Open file for appending: the file is opened for writing, but the old
 contents of the file is not erased and the file pointer is initially placed at the end of the file;
-can not be used with Access()}
+can not be used with Access(). This is the same as {\bf wxFile::write} if the
+file doesn't exist.}
 \end{twocollist}
 
 Other constants defined elsewhere but used by wxFile functions are wxInvalidOffset which represents an

src/common/file.cpp

@@ -221,7 +221,7 @@ bool wxFile::Open(const wxChar *szFileName, OpenMode mode, int accessMode)
             break;
 
         case write_append:
-            flags |= O_WRONLY | O_APPEND;
+            flags |= O_WRONLY | O_CREAT | O_APPEND;
             break;
 
         case read_write: