Fix for bug [d1a5067111], related to the TouchpadScroll event bindings. #419

Job	Run time
build (gcc)	1m 43s
test (gcc)	4m 6s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 43s
test (gcc, --disable-xft)	3m 54s
build (gcc, --disable-xft)	2m 5s
test (gcc, --enable-symbols)	3m 22s
build (gcc, --disable-xss)	1m 40s
build (gcc, --enable-symbols)	1m 15s
build (clang)	1m 56s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 49s
build (clang, --disable-xft)	1m 54s
build (clang, --disable-xss)	1m 52s
build (clang, --enable-symbols)	1m 27s
	28m 46s

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