Fix incorrect extension dependency for Modf #1161

Job	Run time
iOS	13m 8s
android (ON)	6m 8s
linux (clang, clang++, Debug)	6m 22s
android (OFF)	5m 32s
emscripten	2m 3s
linux (clang, clang++, Release)	6m 29s
linux-asan (gcc, g++, Debug, -fsanitize=address)	8m 29s
linux-asan (gcc, g++, Debug, -fsanitize=thread)	13m 31s
linux (gcc, g++, Debug)	7m 2s
linux-shared (clang, clang++, Release)	6m 31s
linux (gcc, g++, Release)	5m 58s
linux-asan (gcc, g++, Debug, -fsanitize=undefined)	8m 49s
linux-shared (gcc, g++, Release)	6m 1s
macos (macos-14, clang, clang++, Debug)	4m 30s
macos (macos-14, clang, clang++, Release)	5m 0s
windows (windows-2019, windows, Debug)	5m 11s
macos-shared (macos-14, clang, clang++, Release)	3m 47s
macos (macos-13, clang, clang++, Debug)	10m 55s
windows-shared (windows-2019, windows, Debug)	5m 26s
windows (windows-2019, windows, Release)	5m 38s
macos (macos-13, clang, clang++, Release)	5m 51s
windows-shared (windows-2019, windows, Release)	5m 46s
	2h 28m 7s

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