patch 8.1.0787: compiler warning for unused function

Problem:    Compiler warning for unused function. (Tony Mechelynck)
Solution:   Tune #ifdef around setjmp functions.

Author: brammool

src/os_unix.c

@@ -980,7 +980,11 @@ sig_alarm SIGDEFARG(sigarg)
 }
 #endif
 
-#if defined(HAVE_SETJMP_H) || defined(PROTO)
+#if (defined(HAVE_SETJMP_H) \
+	&& ((defined(FEAT_X11) && defined(FEAT_XCLIPBOARD)) \
+	    || defined(FEAT_LIBCALL))) \
+    || defined(PROTO)
+
 // argument to SETJMP()
 static JMP_BUF lc_jump_env;
 
@@ -7490,9 +7494,9 @@ setup_term_clip(void)
     if (app_context != NULL && xterm_Shell == (Widget)0)
     {
 	int (*oldhandler)();
-#if defined(HAVE_SETJMP_H)
+# if defined(HAVE_SETJMP_H)
 	int (*oldIOhandler)();
-#endif
+# endif
 # ifdef ELAPSED_FUNC
 	elapsed_T start_tv;
 
@@ -7503,7 +7507,7 @@ setup_term_clip(void)
 	/* Ignore X errors while opening the display */
 	oldhandler = XSetErrorHandler(x_error_check);
 
-#if defined(HAVE_SETJMP_H)
+# if defined(HAVE_SETJMP_H)
 	/* Ignore X IO errors while opening the display */
 	oldIOhandler = XSetIOErrorHandler(x_IOerror_check);
 	mch_startjmp();
@@ -7513,21 +7517,21 @@ setup_term_clip(void)
 	    xterm_dpy = NULL;
 	}
 	else
-#endif
+# endif
 	{
 	    xterm_dpy = XtOpenDisplay(app_context, xterm_display,
 		    "vim_xterm", "Vim_xterm", NULL, 0, &z, &strp);
 	    if (xterm_dpy != NULL)
 		xterm_dpy_retry_count = 0;
-#if defined(HAVE_SETJMP_H)
+# if defined(HAVE_SETJMP_H)
 	    mch_endjmp();
-#endif
+# endif
 	}
 
-#if defined(HAVE_SETJMP_H)
+# if defined(HAVE_SETJMP_H)
 	/* Now handle X IO errors normally. */
 	(void)XSetIOErrorHandler(oldIOhandler);
-#endif
+# endif
 	/* Now handle X errors normally. */
 	(void)XSetErrorHandler(oldhandler);
 

src/version.c

@@ -791,6 +791,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    787,
 /**/
     786,
 /**/