Fix detection of cula

theano/sandbox/cuda/cula.py

@@ -10,9 +10,9 @@ dimshuffle = cuda_ndarray.cuda_ndarray.dimshuffle
 
 try:
     from scikits.cuda import cula
-    cula_available = False
-except ImportError:
-    warnings.warn("CULA import failed in theano.sandbox.cuda.cula")
+    cula_available = True
+except (ImportError, OSError):
+    pass
 
 cula_initialized = False
 if cula_available and cula and not cula_initialized:

theano/sandbox/cuda/tests/test_cula.py

@@ -10,12 +10,12 @@ import theano.sandbox.cuda as cuda_ndarray
 if not cuda_ndarray.cuda_available:
     raise SkipTest('Optional package cuda not available')
 from theano.misc.pycuda_init import pycuda_available
-from theano.sandbox.cuda.cula import scikits_cuda_available
+from theano.sandbox.cuda.cula import cula_available
 
 if not pycuda_available:
     raise SkipTest('Optional package pycuda not available')
-if not scikits_cuda_available:
-    raise SkipTest('Optional package scikits.cuda not available')
+if not cula_available:
+    raise SkipTest('Optional package scikits.cuda.cula not available')
 
 from theano.sandbox.cuda import cula