Fix for bug [126d071408]. #1252

Job	Run time
build (gcc)	1m 46s
test (gcc)	4m 14s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 38s
test (gcc, --disable-xft)	4m 37s
build (gcc, --disable-shared)	1m 37s
test (gcc, --enable-symbols)	3m 40s
build (gcc, --disable-xft)	1m 56s
build (gcc, --disable-xss)	1m 35s
build (gcc, --enable-symbols)	1m 30s
build (clang)	1m 55s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 57s
build (clang, --disable-shared)	1m 50s
build (clang, --disable-xft)	1m 54s
build (clang, --disable-xss)	1m 58s
build (clang, --enable-symbols)	1m 30s
	33m 37s

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