More stable workaround for MinGW _ftelli64() issue #1340

Job	Run time
🔨 MSVC x86 cpp11	2m 28s
🔨 MSVC x64 cpp11	2m 15s
🔧 MinGW fluidsynth-mingw2 x86	1m 43s
🔨 MSVC x86 glib	2m 15s
🔨 MSVC x64 glib	2m 27s
🔧 MSVC Additional (minimal)	2m 27s
🔧 MSVC Additional (no_network)	2m 1s
🔧 MinGW fluidsynth-mingw-ffloat-store x86	2m 25s
🔧 MinGW fluidsynth-mingw x64	1m 45s
🔧 MinGW fluidsynth-mingw-static x64	2m 32s
🚧🟨 ucrt64 cpp11	3m 22s
🔧 MSVC Additional (default)	2m 7s
🚧⬛ mingw32 cpp11	3m 30s
🚧🟨 ucrt64 glib	3m 14s
🚧🟦 mingw64 cpp11	3m 38s
🔧 MSVC Additional (static_lib)	2m 2s
🚧🟧 clang64 glib	3m 51s
🚧🟧 clang64 cpp11	3m 38s
🔧 MSVC Additional (osal_cpp11)	2m 3s
🚧🟦 mingw64 glib	3m 47s
🔧 MSVC Additional (debug_prof)	2m 10s
🚧⬛ mingw32 glib	3m 26s
🔧 MinGW fluidsynth-mingw1 x86	1m 43s
🔧 MinGW fluidsynth-mingw x86	1m 49s
🧪 Acceptance Test	6s
🚀 Publish Release Artifacts	0s
📢 Announce Release	0s
	1h 2m 44s

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