Fix [198376af5a]: When moving tab position to different edge of noteb… #290

Job	Run time
build (gcc)	2m 36s
test (gcc)	4m 12s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	2m 27s
test (gcc, --disable-xft)	4m 18s
build (gcc, --disable-shared)	2m 1s
test (gcc, --enable-symbols)	3m 36s
build (gcc, --disable-xft)	2m 24s
build (gcc, --disable-xss)	2m 51s
build (gcc, --enable-symbols)	1m 33s
build (clang)	2m 40s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	2m 47s
build (clang, --disable-shared)	2m 12s
build (clang, --disable-xft)	2m 14s
build (clang, --disable-xss)	2m 38s
build (clang, --enable-symbols)	2m 4s
	40m 33s

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