staging: speakup: remove space after a cast

Remove blank space after a cast to conform to Linux kernel coding style.
Problem found using checkpatch.

Signed-off-by: Santha Meena Ramamoorthy <santhameena13@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/speakup/speakup_dtlk.c

@@ -266,7 +266,7 @@ static char synth_read_tts(void)
 	outb_p(ch, speakup_info.port_tts);
 	while (synth_readable())
 		cpu_relax();
-	return (char) ch;
+	return (char)ch;
 }
 
 /* interrogate the DoubleTalk PC and return its settings */