enable cuda tests when cuda is available, even if it is not enabled.

theano/sandbox/cuda/tests/test_basic_ops.py

@@ -11,7 +11,7 @@ import theano.tensor as T
 # Skip test if cuda_ndarray is not available.
 from nose.plugins.skip import SkipTest
 import theano.sandbox.cuda as cuda_ndarray
-if cuda_ndarray.cuda_enabled == False:
+if cuda_ndarray.cuda_available == False:
     raise SkipTest('Optional package cuda disabled')
 
 import theano.sandbox.cuda as tcn

theano/sandbox/cuda/tests/test_blas.py

@@ -8,7 +8,7 @@ import numpy
 # Skip test if cuda_ndarray is not available.
 from nose.plugins.skip import SkipTest
 import theano.sandbox.cuda as cuda_ndarray
-if cuda_ndarray.cuda_enabled == False:
+if cuda_ndarray.cuda_available == False:
     raise SkipTest('Optional package cuda disabled')
 
 import theano.sandbox.cuda as tcn

theano/sandbox/cuda/tests/test_conv_cuda_ndarray.py

@@ -5,7 +5,7 @@ import theano
 # Skip test if cuda_ndarray is not available.
 from nose.plugins.skip import SkipTest
 import theano.sandbox.cuda as cuda_ndarray
-if cuda_ndarray.cuda_enabled == False:
+if cuda_ndarray.cuda_available == False:
     raise SkipTest('Optional package cuda disabled')
     
 cuda_tensor4 = cuda_ndarray.CudaNdarrayType([False]*4)

theano/sandbox/cuda/tests/test_cuda_ndarray.py

@@ -3,7 +3,7 @@ import theano
 import theano.sandbox.cuda as cuda_ndarray
 # Skip test if cuda_ndarray is not available.
 from nose.plugins.skip import SkipTest
-if cuda_ndarray.cuda_enabled == False:
+if cuda_ndarray.cuda_available == False:
         raise SkipTest('Optional package cuda disabled')
 import numpy