Default naming rules for enums (probably other elements)  sometimes output names starting with digits.

There should probably be some default prefix added when the generator tries to create names starting with digits. 
```cpp
typedef enum
{
    NV_MOSAIC_TOPO_1x2_PASSIVE_STEREO = NV_MOSAIC_TOPO_BEGIN_PASSIVE_STEREO,
} NV_MOSAIC_TOPO
```
```
1x2PassiveStereo = unchecked((System.Int32)(24)),
```