Try to fix an issue with postgress and search vertical code, a=chris

diff --git a/src/models/SearchverticalsModel.php b/src/models/SearchverticalsModel.php
index 15af3da55..3a25c6ba6 100644
--- a/src/models/SearchverticalsModel.php
+++ b/src/models/SearchverticalsModel.php
@@ -144,6 +144,8 @@ class SearchverticalsModel extends GroupModel
      *      the url or host of the url has already been hashed so don't want
      *      to hash it again.
      *  @return array [int, int] that corresponds to the hash of the input
+     *      to keep postgres happy (no unsigned ints) we make the value
+     *      of this function signed
      */
     public function hashIntPair($input, $compute_hash = true)
     {
@@ -152,8 +154,8 @@ class SearchverticalsModel extends GroupModel
         } else {
             $hash = $input;
         }
-        $front = abs(L\unpackInt(substr($hash, 0, 4)));
-        $back = abs(L\unpackInt(substr($hash, 4, 4)));
+        $front = abs(L\unpackInt(substr($hash, 0, 4))) - 2147483648;
+        $back = abs(L\unpackInt(substr($hash, 4, 4))) - 2147483648;
         return [$front, $back];
     }
     /**