staging/speakup: fix get_word non-space look-ahead

get_char was erroneously given the address of the pointer to the text
instead of the address of the text, thus leading to random crashes when
the user requests speaking a word while the current position is on a space
character and say_word_ctl is not enabled.

Reported-on: bytefire/speakup#1
Reported-by: Kirk Reiser <[email protected]>
Reported-by: Janina Sajka <[email protected]>
Reported-by: Alexandr Epaneshnikov <[email protected]>
Reported-by: Gregory Nowak <[email protected]>
Reported-by: deedra waters <[email protected]>
Signed-off-by: Samuel Thibault <[email protected]>
Tested-by: Alexandr Epaneshnikov <[email protected]>
Tested-by: Gregory Nowak <[email protected]>
Tested-by: Michael Taboada <[email protected]>
Cc: stable <[email protected]>
Link: https://lore.kernel.org/r/20200306003047.thijtmqrnayd3dmw@function
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: sthibaul

drivers/staging/speakup/main.c

@@ -561,7 +561,7 @@ static u_long get_word(struct vc_data *vc)
 		return 0;
 	} else if (tmpx < vc->vc_cols - 2 &&
 		   (ch == SPACE || ch == 0 || (ch < 0x100 && IS_WDLM(ch))) &&
-		   get_char(vc, (u_short *)&tmp_pos + 1, &temp) > SPACE) {
+		   get_char(vc, (u_short *)tmp_pos + 1, &temp) > SPACE) {
 		tmp_pos += 2;
 		tmpx++;
 	} else {