terminal: remove unused return value

osdep/terminal-unix.c

@@ -474,7 +474,7 @@ void terminal_get_size(int *w, int *h)
     *h = ws.ws_row;
 }
 
-int terminal_init(void)
+void terminal_init(void)
 {
     assert(!getch2_enabled);
     getch2_enabled = 1;
@@ -486,6 +486,4 @@ int terminal_init(void)
     setsigaction(SIGTTOU, SIG_IGN, 0, true);
 
     getch2_poll();
-
-    return 0;
 }

osdep/terminal-win.c

@@ -285,7 +285,7 @@ bool terminal_try_attach(void)
     return true;
 }
 
-int terminal_init(void)
+void terminal_init(void)
 {
     CONSOLE_SCREEN_BUFFER_INFO cinfo;
     DWORD cmode = 0;
@@ -295,5 +295,4 @@ int terminal_init(void)
     SetConsoleMode(hSTDERR, cmode);
     GetConsoleScreenBufferInfo(hSTDOUT, &cinfo);
     stdoutAttrs = cinfo.wAttributes;
-    return 0;
 }

osdep/terminal.h

@@ -26,7 +26,7 @@
 struct input_ctx;
 
 /* Global initialization for terminal output. */
-int terminal_init(void);
+void terminal_init(void);
 
 /* Setup ictx to read keys from the terminal */
 void terminal_setup_getch(struct input_ctx *ictx);