Fix C++ class initializers not always being fontified at mode start.

Fix C++ class initializers not always being fontified at mode start.

The problem here happened when an "outer list" of declarations moved beyond an
"inner list" containing class initializers.  These weren't being checked for
by the code.

Also, fix places in c-get-fontification-context where point is undefined.

* lisp/progmodes/cc-fonts.el (c-get-fontification-context): when argument
not-front-decl is set, test for class initializers.  Also, anchor point in
places where it is moved and is otherwise undefined.