CLSA-2026-1771010890 freerdp: Fix of 5 CVEs

CVE-2026-22859: fix out-of-bounds access due to missing interface index validation in urbdrc channel - CVE-2026-23732: fix out-of-bounds read due to missing input length check in glyph conversion - CVE-2026-23883: fix integer overflow in cursor pixel allocation and surface-to-surface rectangle...