added version of the gpu code

theano/sandbox/cuda/blas.py

@@ -192,6 +192,9 @@ class GpuConv(Op):
     def c_headers(self):
         return ['cuda_ndarray.cuh','<stdio.h>']
 
+    def c_code_cache_version(self):
+        return (0,1)
+
     def c_support_code_apply(self, node, nodename):
         return open(os.path.join(os.path.split(__file__)[0],'conv_kernel.cu')).read()+\
             open(os.path.join(os.path.split(__file__)[0],'conv_full_kernel.cu')).read()+\