wolfssl/wolfcrypt/types.h: add 'U' suffix to W64LIT() macro defs, and add SW64LIT() macro defs (not yet used anywhere);
wolfcrypt/src/asn.c: add !WOLFSSL_ECC_CURVE_STATIC gate around DataToHexStringAlloc() to resolve -Wunused;
wolfcrypt/src/ecc.c: guard against zero-valued "len" arg to wc_ecc_get_curve_id_from_oid();
wolfcrypt/src/wc_port.c: fix several argument implicit sign changes in USE_WINDOWS_API paths;
wolfssl/wolfcrypt/ecc.h: remove const attribute from inline buffers in WOLFSSL_ECC_CURVE_STATIC struct ecc_set_type.