Avoid implicit conversion to double.

The double literal will cause us to unnecessarily convert to double.
diff --git a/qcmsint.h b/qcmsint.h
index 217b651..c34f099 100644
--- a/qcmsint.h
+++ b/qcmsint.h
@@ -143,7 +143,7 @@
 
 static inline float s15Fixed16Number_to_float(s15Fixed16Number a)
 {
-	return ((int32_t)a)/65536.;
+	return ((int32_t)a)/65536.f;
 }
 
 static inline s15Fixed16Number double_to_s15Fixed16Number(double v)