Do not show exception message if it's empty.

# Is there a way to preserve the case of the exception class here?

Make default message look better.

Show the exception message again after __toString() magic has been dropped.

Fixed crash demonstrated with ext/dom/tests/dom003.phpt test case.

Check return value of exception::__tostring()

Make exception code more robust:
- Fix error in calculation of trace-string length
- Allow to overload __strostring() and make it work for uncaught exceptions
- Show exception thrown whil

Make exception code more robust:
- Fix error in calculation of trace-string length
- Allow to overload __strostring() and make it work for uncaught exceptions
- Show exception thrown while displaying exceptions

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This forces a better error message for non working clone calls.

And use things to throw an exception here

You shall not clone Exception instances

Impement userspace iterator interfaces and tests. See tests for details
on the names.

The string conversion method should be named __toString()

Added c-api for iterators
# After 4 Month work and endless discussions...

Fix cast function

Use studlyCaps in exception class

Use type instead of constant

Disallow to changing the backtrace

Provide string casting for exceptions by calling toString()

Fix handling of static properties initialized to arrays

Don't loose information if no parameters were shown.
# Noticed by Sebatian Bergmann

Show {main} and prevent showing empty stack traces

Clearify this

Revert what I think is an accidental commit by Marcus that slipped in at revision 1.23. Declaring getMessage() as final is a PITA, so I hope it will not come to that.

Excluded chars < 32 when displaying string parameters that would obliterate output.

Make vspprintf available as zend utility function. Use it in exception output.

Actually fetch the parameter