- fixed two bugs which caused MBCS chars to be treated wrongly in validate_filename and therefore trim too much when validating a path

- converted minus ones to INVALID_FILE_ATTRIBUTES


git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@3439 212acab6-be3b-0410-9dea-997c60f758d6

Source/exehead/Ui.c

@@ -243,7 +243,7 @@ __forceinline int NSISCALL ui_doinstall(void)
           {
             DWORD d;
             d=GetFileAttributes(p);
-            if (d == (DWORD)-1 || !(d&FILE_ATTRIBUTE_DIRECTORY))
+            if (d == INVALID_FILE_ATTRIBUTES || !(d&FILE_ATTRIBUTE_DIRECTORY))
             {
               // if there is no back-slash, the string will become empty, but that's ok because
               // it would make an invalid instdir anyway