SWIG

Small tweak to the SwigValueWrapper, it could output types like:

SwigValueWrapper<::foo > bar;

The "<:" token annoys GCC.

I copied from similar code found in stype.c to create this patch.

Note: the SwigType_alttype function has two main branches that have similar
code, in the first case it does:

if (use_wrapper) {
String *str = SwigType_str(td, 0);
w = NewStringf("SwigValueWrapper<%s >", str);
Delete(str);
}

and in the second case it does:

if (use_wrapper) {
w = NewStringf("SwigValueWrapper<%s >", td);
}

td is a SwigType* in both cases. The stringification of td in the second
case seemed suspicious to me so in my patch I changed the code to match the
use in the first case.

It looks like this function could be cleaned up further by pulling the
now-identical use_wrapper blocks out of the main if/else.