deprecated attribute for procedure declarations

core/_preload.odin

@@ -877,6 +877,7 @@ __cstring_len :: proc "contextless" (s: cstring) -> int {
 }
 
 __cstring_to_string :: proc "contextless" (s: cstring) -> string {
+	if s == nil do return "";
 	ptr := (^byte)(s);
 	n := __cstring_len(s);
 	return transmute(string)raw.String{ptr, n};

core/strings.odin

@@ -15,8 +15,8 @@ new_cstring :: proc(s: string) -> cstring {
 	return cstring(&c[0]);
 }
 
+@(deprecated="Please use a standard cast for cstring to string")
 to_odin_string :: proc(str: cstring) -> string {
-	if str == nil do return "";
 	return string(str);
 }