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* the code for BLI_is_dir can be shared on Windows, no need of extra implementation - error was usage of BLI_exists instead of BLI_exist! 
* left BLI_is_dir in since it's nicer to read and understand
* also removed deprecated outliner_header from MSVC projectfiles.

projectfiles_vc9/blender/editors/ED_editors.vcproj

@@ -539,10 +539,6 @@
 				RelativePath="..\..\..\source\blender\editors\space_outliner\outliner.c"
 				>
 			</File>
-			<File
-				RelativePath="..\..\..\source\blender\editors\space_outliner\outliner_header.c"
-				>
-			</File>
 			<File
 				RelativePath="..\..\..\source\blender\editors\space_outliner\outliner_intern.h"
 				>

source/blender/blenlib/intern/storage.c

@@ -470,11 +470,7 @@ int BLI_exist(char *name)
 
 /* would be better in fileops.c except that it needs stat.h so add here */
 int BLI_is_dir(char *file) {
-#ifdef WIN32
-	return 1; /* XXX - TODO */
-#else
 	return S_ISDIR(BLI_exist(file));
-#endif
 }
 
 LinkNode *BLI_read_file_as_lines(char *name)