Fix import error if PyDAP isn't present

metobs/data/__init__.py

@@ -13,7 +13,7 @@ from numpy import array, average, zeros, radians, degrees, arctan2, sin, cos, nd
 from numpy.ma import masked_array, average as masked_average, MaskedArray, masked_where, column_stack
 try:
     from pydap.client import open_url as dapopen
-except ImportError:
+except:
     dapopen = open 
 
 from metobs import mytime