cleanup: A more descriptive error for group invite accept function

Author: JFreegman

toxcore/tox.c

@@ -4269,7 +4269,7 @@ uint32_t tox_group_invite_accept(Tox *tox, uint32_t friend_number, const uint8_t
         }
 
         case -6: {
-            SET_ERROR_PARAMETER(error, TOX_ERR_GROUP_INVITE_ACCEPT_CORE);
+            SET_ERROR_PARAMETER(error, TOX_ERR_GROUP_INVITE_ACCEPT_FRIEND_NOT_FOUND);
             return UINT32_MAX;
         }
 

toxcore/tox.h

@@ -4888,9 +4888,9 @@ typedef enum Tox_Err_Group_Invite_Accept {
     TOX_ERR_GROUP_INVITE_ACCEPT_PASSWORD,
 
     /**
-     * There was a core error when initiating the group.
+     * The friend number passed did not designate a valid friend.
      */
-    TOX_ERR_GROUP_INVITE_ACCEPT_CORE,
+    TOX_ERR_GROUP_INVITE_ACCEPT_FRIEND_NOT_FOUND,
 
     /**
      * Packet failed to send.

toxcore/tox_api.c

@@ -1451,8 +1451,8 @@ const char *tox_err_group_invite_accept_to_string(Tox_Err_Group_Invite_Accept va
         case TOX_ERR_GROUP_INVITE_ACCEPT_PASSWORD:
             return "TOX_ERR_GROUP_INVITE_ACCEPT_PASSWORD";
 
-        case TOX_ERR_GROUP_INVITE_ACCEPT_CORE:
-            return "TOX_ERR_GROUP_INVITE_ACCEPT_CORE";
+        case TOX_ERR_GROUP_INVITE_ACCEPT_FRIEND_NOT_FOUND:
+            return "TOX_ERR_GROUP_INVITE_ACCEPT_FRIEND_NOT_FOUND";
 
         case TOX_ERR_GROUP_INVITE_ACCEPT_FAIL_SEND:
             return "TOX_ERR_GROUP_INVITE_ACCEPT_FAIL_SEND";