I hate it that with my compiler at least, it doesn't catch totally uncompilable
statements in templates if they are not used...

Not sure why only one of the bots sees this as visible...

To better catch errors locally.

Maybe I should disable C++11 detection such that my compiler also catches
these.  Doesn't look like we can switch to it for a while anyway...

Defining _POSIX_C_SOURCE to an old version on FreeBSD can cause C99 to
be disabled in libc.

Ouch. I need a better workflow for this.

It's dead, Jim!

Apparently CoreText does allow these.  To be done: detect infinite
loops.

Fixes MORX-12 test.

line 323: Warning: info hides hb_buffer_t::info
...

Don't know why this is not caught by my compiler.  Looks like clang catches it
while gcc doesn't.

In file included from ../src/hb-aat-layout-morx-table.hh:31:
../src/hb-aat-layout-common-private.hh:523:30: error: no member named 'static_size' in 'AAT::ContextualSubtable<AAT::MorxTypes>::EntryData'
  DEFINE_SIZE_STATIC (4 + T::static_size);
                            ~~~^

Fixes MORX-11 test.

Tested with Zapfino and text "2nd". Sascha will create tests later.

Passes MORX-10 test now.