Fixes for three classes of C++ errors (real errors, not warnings):

"C++11 requires a space between literal and identifier",
"non-constant-expression cannot be narrowed from type 'int' to
'size_t'" and "constant expression evaluates to -2147483648 which
cannot be narrowed to type 'ULONG'".

I didn't bother any more and just use --disable-firebird-sdbc
instead now in the tree where I use Clang and C++11.

Change-Id: Ie47e2ceef8e014c48e50f5afa5df6f625040974c