Enforce int type on x86 when applicable

Author: valga

src/Thrift/Compact/ReadBuffer.php

@@ -76,6 +76,10 @@ public function readVarint()
         }
         if (PHP_INT_SIZE === 4) {
             $result = gmp_strval($result, 10);
+            $intResult = (int) $result;
+            if ((string) $intResult === $result) {
+                $result = $intResult;
+            }
         }
 
         return $result;

src/Thrift/Compact/Reader.php

@@ -187,6 +187,10 @@ private function fromZigZag($n)
         }
         if (PHP_INT_SIZE === 4) {
             $result = gmp_strval($result, 10);
+            $intResult = (int) $result;
+            if ((string) $intResult === $result) {
+                $result = $intResult;
+            }
         }
 
         return $result;