gis: gdal: Fixed Driver and DataSource bug reported by David Hancock in django-users and reproduced by tlp.

git-svn-id: http://code.djangoproject.com/svn/django/branches/gis@7003 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/gis/gdal/datasource.py

@@ -67,8 +67,7 @@ class DataSource(object):
 
         # Registering all the drivers, this needs to be done
         #  _before_ we try to open up a data source.
-        if not get_driver_count() and not register_all():
-            raise OGRException('Could not register all the OGR data source drivers!')
+        if not get_driver_count(): register_all()
 
         if isinstance(ds_input, basestring):
             # The data source driver is a void pointer.

django/contrib/gis/gdal/driver.py

@@ -57,8 +57,7 @@ class Driver(object):
         "Attempts to register all the data source drivers."
         # Only register all if the driver count is 0 (or else all drivers
         # will be registered over and over again)
-        if not self.driver_count and not register_all():
-            raise OGRException('Could not register all the OGR data source drivers!')
+        if not self.driver_count: register_all()
                     
     # Driver properties
     @property

django/contrib/gis/gdal/prototypes/generation.py

@@ -103,6 +103,9 @@ def void_output(func, argtypes, errcheck=True):
         # return void, rather than a status code.
         func.restype = c_int
         func.errcheck = check_errcode
+    else:
+        func.restype = None
+        
     return func
 
 def voidptr_output(func, argtypes):