Added a note in GetEscapements

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12688 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/Font.cpp

@@ -949,6 +949,8 @@ BFont::GetEscapements(const char charArray[], int32 numChars, escapement_delta *
 	if (!charArray ||  numChars<1 || !escapementArray)
 		return;
 
+	// NOTE: The R5 implementation crashes if delta == NULL!
+
 	int32 code;
 	BPrivate::BAppServerLink link;