glsl: use the correct parent when allocating program data members

Cc: "17.2 17.3" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/compiler/glsl/link_uniforms.cpp

@@ -1333,7 +1333,7 @@ link_assign_uniform_storage(struct gl_context *ctx,
 
    union gl_constant_value *data;
    if (prog->data->UniformStorage == NULL) {
-      prog->data->UniformStorage = rzalloc_array(prog,
+      prog->data->UniformStorage = rzalloc_array(prog->data,
                                                  struct gl_uniform_storage,
                                                  prog->data->NumUniformStorage);
       data = rzalloc_array(prog->data->UniformStorage,