Fix for bug [126d071408]. #510

Job	Run time
build (gcc)	1m 41s
test (gcc)	4m 9s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 44s
test (gcc, --disable-xft)	4m 13s
build (gcc, --disable-xft)	1m 42s
test (gcc, --enable-symbols)	3m 34s
build (gcc, --disable-xss)	1m 43s
build (gcc, --enable-symbols)	1m 15s
build (clang)	1m 52s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 58s
build (clang, --disable-xft)	1m 54s
build (clang, --disable-xss)	1m 58s
build (clang, --enable-symbols)	1m 27s
	29m 10s

Provide feedback