Fix [bcbf4c9875]: Tk intialization overwrites thread specific data #494

Job	Run time
build (gcc)	1m 48s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 47s
test (gcc)	4m 1s
build (gcc, --disable-xft)	2m 7s
test (gcc, --disable-xft)	4m 0s
build (gcc, --disable-xss)	1m 44s
test (gcc, --enable-symbols)	3m 35s
build (gcc, --enable-symbols)	1m 19s
build (clang)	1m 52s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	2m 0s
build (clang, --disable-xft)	1m 55s
build (clang, --disable-xss)	2m 31s
build (clang, --enable-symbols)	1m 32s
	30m 11s

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