fix: build mingw correctly in ffmepg encoder

Author: Totto16

src/graphics/meson.build

@@ -24,8 +24,8 @@ if replay_video_rendering_enabled
             'video_renderer_embedded.cpp',
         )
     else
-
-        if host_machine.system() == 'darwin' or host_machine.system() == 'linux'
+        cpp = meson.get_compiler('cpp')
+        if host_machine.system() == 'darwin' or host_machine.system() == 'linux' or (cpp.get_id() == 'gcc' and host_machine.system() == 'windows')
             graphics_src_files += files(
                 'video_renderer_unix.cpp',
             )

src/graphics/video_renderer_windows.cpp

@@ -2,7 +2,9 @@
 #include "video_renderer.hpp"
 
 #define WIN32_LEAN_AND_MEAN
+#ifndef NOMINMAX
 #define NOMINMAX
+#endif
 
 #include <windows.h>