patch 8.0.1198: older compilers don't know uint8_t

Problem:    Older compilers don't know uint8_t.
Solution:   Use char_u instead.

src/proto/term.pro

@@ -64,8 +64,8 @@ char_u *get_termcode(int i);
 void del_termcode(char_u *name);
 void set_mouse_topline(win_T *wp);
 int check_termcode(int max_offset, char_u *buf, int bufsize, int *buflen);
-void term_get_fg_color(uint8_t *r, uint8_t *g, uint8_t *b);
-void term_get_bg_color(uint8_t *r, uint8_t *g, uint8_t *b);
+void term_get_fg_color(char_u *r, char_u *g, char_u *b);
+void term_get_bg_color(char_u *r, char_u *g, char_u *b);
 char_u *replace_termcodes(char_u *from, char_u **bufp, int from_part, int do_lt, int special);
 int find_term_bykeys(char_u *src);
 void show_termcodes(void);

src/term.c

@@ -3529,7 +3529,7 @@ may_req_bg_color(void)
     {
 	int didit = FALSE;
 
-#ifdef FEAT_TERMINAL
+# ifdef FEAT_TERMINAL
 	/* Only request foreground if t_RF is set. */
 	if (rfg_status == STATUS_GET && *T_RFG != NUL)
 	{
@@ -3538,7 +3538,7 @@ may_req_bg_color(void)
 	    rfg_status = STATUS_SENT;
 	    didit = TRUE;
 	}
-#endif
+# endif
 
 	/* Only request background if t_RB is set. */
 	if (rbg_status == STATUS_GET && *T_RBG != NUL)
@@ -5833,7 +5833,7 @@ check_termcode(
  * Get the text foreground color, if known.
  */
     void
-term_get_fg_color(uint8_t *r, uint8_t *g, uint8_t *b)
+term_get_fg_color(char_u *r, char_u *g, char_u *b)
 {
     if (rfg_status == STATUS_GOT)
     {
@@ -5847,7 +5847,7 @@ term_get_fg_color(uint8_t *r, uint8_t *g, uint8_t *b)
  * Get the text background color, if known.
  */
     void
-term_get_bg_color(uint8_t *r, uint8_t *g, uint8_t *b)
+term_get_bg_color(char_u *r, char_u *g, char_u *b)
 {
     if (rbg_status == STATUS_GOT)
     {

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1198,
 /**/
     1197,
 /**/