Use cstring_to_vstring instead of .vstring()

Author: malisipi

vwebui.v

@@ -131,7 +131,7 @@ pub mut:
 	bool	bool
 }
 pub fn (e &CEvent) get () WebuiResponseData {
-    str := unsafe { C.webui_get_string(e).vstring() }
+    str := unsafe { cstring_to_vstring(C.webui_get_string(e)) }
     return WebuiResponseData {
         string: str
         int: str.int()
@@ -269,4 +269,4 @@ pub fn new_window_by_id(win_id u64) Window {
 
 pub fn new_id() u64 {
 	return C.webui_get_new_window_id()
-}
+}