Laffinty/FCEUX11 v1.15_hotfix3_v2

FCEUX11 v1.15 (hotfix3)

on GitHub

hotfix3 分 5 阶段落地 21 个 PR，修复 11 处跨线程数据竞争与 3 处内存安全隐患，通过按需分配视频缓冲回收约 22 MiB BSS，并对 4 条热路径完成微优化。
hotfix3 lands 21 PRs across 5 phases, fixing 11 cross-thread data races, 3 memory-safety holes, and reclaiming ~22 MiB BSS via on-demand pixbuf allocation plus 4 hot-path micro-optimizations.