Only call runAjaxHooks once (after first regex-function mapping added)

Fixes #504.

Author: shu8

sox.common.js

@@ -500,7 +500,11 @@
       if (regexToMatch) {
         hookAjaxObject[regexToMatch] = functionToExecute;
       }
-      sox.helpers.runAjaxHooks();
+
+      // Only override the XMLHttpRequest.prototype.open function once (after adding the first regex-function mapping)
+      if (Object.keys(hookAjaxObject).length <= 1) {
+        sox.helpers.runAjaxHooks();
+      }
     },
   };
 

sox.user.js

@@ -3,7 +3,7 @@
 // @namespace    https://github.com/soscripted/sox
 // @homepage     https://github.com/soscripted/sox
 // @homepageURL  https://github.com/soscripted/sox
-// @version      2.8.5 DEV
+// @version      2.8.6 DEV
 // @description  Extra optional features for Stack Overflow and Stack Exchange sites
 // @contributor  ᴉʞuǝ (https://stackoverflow.com/users/1454538/, https://github.com/mezmi)
 // @contributor  ᔕᖺᘎᕊ (https://stackexchange.com/users/4337810/, https://github.com/shu8)