Autoadjust size on startup

config.def.h

@@ -41,6 +41,7 @@ static const char DEFAULT_TEXT[] = "[No Name]";
 
 /* additional settings */
 #define SHOW_SCROLLBARS 0
+#define ADJUST_OPEN ADJUST_BESTFIT
 
 /* shortcuts */
 Shortcut shortcuts[] = {

zathura.c

@@ -2322,6 +2322,11 @@ int main(int argc, char* argv[])
     cmd_open(2, &argv[1]);
 
   gtk_widget_show_all(GTK_WIDGET(Zathura.UI.window));
+
+  Argument arg;
+  arg.n = ADJUST_OPEN;
+  sc_adjust_window(&arg);
+
   gtk_main();
 
   return 0;