cast_function.diff

diff --git a/faiss/swigfaiss.swig b/faiss/swigfaiss.swig
--- a/faiss/swigfaiss.swig
+++ b/faiss/swigfaiss.swig
@@ -548,6 +548,10 @@
     return NULL;
 }

+float * cast_integer_to_float_ptr (long x) {
+    return (float*)x;
+}
+

 %}

@@ -576,6 +580,8 @@
 REV_SWIG_PTR(int, NPY_INT32);
 REV_SWIG_PTR(unsigned char, NPY_UINT8);

+float * cast_integer_to_float_ptr (long x);
+

 #endif