GEOSException not exposed through python bindings

[rcoup]

If you try and parse some invalid WKT (or do a number of other bad things), GEOS will throw an error you can't catch from Python, causing the interpreter to crash.

>>> from qgis.core import QgsGeometry
>>> # WKT has a missing ')'
>>> QgsGeometry.fromWkt("POLYGON((0 0, 1 0, 1 1, 0 0)")
terminate called after throwing an instance of 'GEOSException'
Aborted

ideally a developer should be able to catch it with:

>>> from qgis.core import QgsGeometry, GEOSException
>>> try:
>>>    QgsGeometry.fromWkt("POLYGON((0 0, 1 0, 1 1, 0 0)")
>>> except GEOSException, e:
>>>    print "uh oh, WKT error: %s" % e

[wonder]

This has been fixed in development version already (r14904). It is not possible to catch the exception, you will just get None instead of a valid geometry.