fix the definition of many static functions marked as 'const' or functions which had incoherent default values for their arguments or duplicated functions

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57991 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/file.h

@@ -102,6 +102,8 @@ class wxTempFile
 public:
     /**
         Associates wxTempFile with the file to be replaced and opens it.
+
+        @warning
         You should use IsOpened() to verify that the constructor succeeded.
     */
     wxTempFile(const wxString& strName);
@@ -248,6 +250,9 @@ public:
             The filename.
         @param mode
             The mode in which to open the file.
+
+        @warning
+        You should use IsOpened() to verify that the constructor succeeded.
     */
     wxFile(const wxString& filename,
            wxFile::OpenMode mode = wxFile::read);