Fix typecast

include/clasp/core/float_util.h

@@ -135,7 +135,7 @@ template <typename Float> struct float_convert {
         }
 
         // Check one more time to ensure rounding hasn't increased the width.
-        shift = std::max(std::bit_width(significand) - significand_width, 0);
+        shift = std::max(static_cast<int>(std::bit_width(significand) - significand_width), 0);
         significand = significand >> shift;
         exponent += shift;