fix theano import crash on computer without gpu when theano flags device or…

NEWS.txt

@@ -44,6 +44,9 @@ Internal changes
 
 Crash Fix
  * Don't try to use blas library when told to don't use them(Frederic B.)
+ * When importing theano on a computer without without gpu with the Theano
+   flags device or init_gpu_device to gpu* (Frederic B., Reported Luo Heng)
+
 
 =============
 Release Notes

theano/__init__.py

@@ -101,6 +101,7 @@ if config.device.startswith('gpu') or config.init_gpu_device.startswith('gpu'):
 # We can't test the driver during import of theano.sandbox.cuda as
 # this cause circular import dependency. So we also test it manually
 # after the import
+    if theano.sandbox.cuda.cuda_available:
         import theano.sandbox.cuda.tests.test_driver
         theano.sandbox.cuda.tests.test_driver.test_nvidia_driver1()