Avoid zero-sized arrays which MSVC doesn't like.

theano/sandbox/rng_mrg.py

@@ -397,7 +397,8 @@ class mrg_uniform(mrg_uniform_base):
             NORM = '4.656612873077392578125e-10'
         return """
         //////// <code generated by mrg_uniform>
-        npy_int64 odims[%(ndim)s];
+        // The +1 is to avoid odims[0] which fails on windows
+        npy_int64 odims[%(ndim)s+1];
         npy_int64 n_elements = 1;
         int n_streams = 0;
         int must_alloc_sample = ((NULL == %(o_sample)s)
@@ -668,7 +669,8 @@ class GPU_mrg_uniform(mrg_uniform_base, GpuOp):
         return """
         //////// <code generated by mrg_uniform>
         npy_int64 M1 = 2147483647;      //2^31 - 1
-        npy_int64 odims[%(ndim)s];
+        // The +1 is to avoid odims[0] which fails on windows
+        npy_int64 odims[%(ndim)s+1];
         npy_int64 n_elements = 1;
         int n_streams, n_streams_used_in_this_call;
         int must_alloc_sample = ((NULL == %(o_sample)s)
@@ -932,7 +934,8 @@ class GPUA_mrg_uniform(GpuKernelBase, mrg_uniform_base):
 
         return """
         npy_int64 M1 = 2147483647;      //2^31 - 1
-        size_t odims[%(ndim)s];
+        // The +1 is to avoid odims[0] which fails on windows
+        size_t odims[%(ndim)s+1];
         size_t n_elements = 1;
         unsigned int n_streams;
         int must_alloc_sample = ((NULL == %(o_sample)s)