more cleanup, fix compilation on posix (use dlsym)

examples/hot_reload/message.v

@@ -13,8 +13,8 @@ mut:
 @[live]
 fn print_message(mut app App) {
 	i := live.info()
-	println('OK reloads: ${i.reloads_ok:4d} | Total reloads: ${i.reloads:4d} | ${voidptr(i)} Hello! Modify this message while the program is running. app: ${app}')
-	app.x = 2 // try changing this to another value, while the program is running ...
+	println('OK reloads: ${i.reloads_ok:4d} | Total reloads: ${i.reloads:4d} | Hello! Modify this message while the program is running. app: ${voidptr(app)} | app.x: ${app.x:6} | app.counter: ${app.counter:6}')
+	// app.x = 99 // try changing this to another value, while the program is running ...
 	app.counter++
 }
 

vlib/v/gen/c/live.v

@@ -43,17 +43,19 @@ fn (mut g Gen) generate_hotcode_reloader_code() {
 			for so_fn in g.hotcode_fn_names {
 				load_code << '\timpl_live_${so_fn} = dlsym(live_lib, "impl_live_${so_fn}");'
 			}
+			load_code << 'void (* fn_set_live_reload_pointer)(void *) = (void *)dlsym(live_lib, "set_live_reload_pointer");'
 			phd = posix_hotcode_definitions_1
 		} else {
 			for so_fn in g.hotcode_fn_names {
 				load_code << '\timpl_live_${so_fn} = (void *)GetProcAddress(live_lib, "impl_live_${so_fn}");  '
 			}
+			load_code << 'void (* fn_set_live_reload_pointer)(void *) = (void *)GetProcAddress(live_lib, "set_live_reload_pointer");'
 			phd = windows_hotcode_definitions_1
 		}
-		// Ensure that g_live_reload_info from the executable is passed to the DLL/SO .
+		// Ensure that g_live_reload_info from the executable is passed to the DLL .
 		// See also vlib/v/live/sharedlib/live_sharedlib.v .
-		load_code << 'void (* fn_set_live_reload_pointer)(void *) = (void *)GetProcAddress(live_lib, "set_live_reload_pointer");'
 		load_code << 'if(fn_set_live_reload_pointer){ fn_set_live_reload_pointer( g_live_reload_info ); }'
+
 		g.hotcode_definitions.writeln(phd.replace('@LOAD_FNS@', load_code.join('\n')))
 	}
 }