patch 8.2.2674: Motif: cancelling the font dialog resets the font

Problem:    Motif: cancelling the font dialog resets the font.
Solution:   When no font is selected to not change the font. (closes #7825,
            closes #8035)  Fix compiler warnings.

src/gui_motif.c

@@ -1996,7 +1996,11 @@ do_mnemonic(Widget w, unsigned int keycode)
  * Callback routine for dialog mnemonic processing.
  */
     static void
-mnemonic_event(Widget w, XtPointer call_data UNUSED, XKeyEvent *event)
+mnemonic_event(
+	Widget	    w,
+	XtPointer   call_data UNUSED,
+	XKeyEvent   *event,
+	Boolean	    *b UNUSED)
 {
     do_mnemonic(w, event->keycode);
 }
@@ -3565,7 +3569,8 @@ find_replace_callback(
 find_replace_keypress(
     Widget		w UNUSED,
     SharedFindReplace	*frdp,
-    XKeyEvent		*event)
+    XKeyEvent		*event,
+    Boolean		*b UNUSED)
 {
     KeySym keysym;
 

src/gui_x11.c

@@ -1753,7 +1753,13 @@ gui_mch_init_font(
     // A font name equal "*" is indicating, that we should activate the font
     // selection dialogue to get a new font name. So let us do it here.
     if (font_name != NULL && STRCMP(font_name, "*") == 0)
+    {
 	font_name = gui_xm_select_font(hl_get_font_name());
+
+	// Do not reset to default font except on GUI startup.
+	if (font_name == NULL && !gui.starting)
+	    return OK;
+    }
 #endif
 
 #ifdef FEAT_XFONTSET

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2674,
 /**/
     2673,
 /**/