make code versionable.

theano/sandbox/multinomial.py

@@ -25,8 +25,7 @@ class Multinomial(Op):
         return [None, None]
 
     def c_code_cache_version(self):
-        return ()
-        #return (2,)
+        return (3,)
                 
     def c_code(self, node, name, (pvals, unis), (z,), sub):
 
@@ -115,7 +114,7 @@ class GpuMultinomial(Multinomial):
 
     def c_code_cache_version(self):
         #return ()
-        return (1,)
+        return (super(GpuMultinomial,self).c_code_cache_version(),1)
 
     def c_support_code_apply(self, node, nodename):
         return """

theano/sandbox/rng_mrg.py

@@ -195,9 +195,6 @@ class mrg_uniform(mrg_uniform_base):
         o_rstate[0] = node.outputs[0].type.filter(rstate) # send to GPU if necessary
         o_sample[0] = node.outputs[1].type.filter(rval.reshape(size))# send to GPU if necessary
 
-    def c_code_cache_version(self):
-        return ()
-
     def c_code(self, node, name, (rstate, size), (o_rstate, o_sample), sub):
         if self.inplace:
             o_rstate_requirement = 'NPY_C_CONTIGUOUS|NPY_ALIGNED'
@@ -447,9 +444,6 @@ class GPU_mrg_uniform(mrg_uniform_base):
 
         """ %locals()
 
-    def c_code_cache_version(self):
-        return ()
-
     def c_code(self, node, nodename, (rstate, size), (o_rstate, o_sample), sub):
         inplace = int(self.inplace)
         ndim = self.output_type.ndim