Missing file

(cherry picked from commit f59b8d8a)

modules/audio_filter/spatializer/denormals.c

+// Macro for killing denormalled numbers
+//
+// Written by Jezar at Dreampoint, June 2000
+// http://www.dreampoint.co.uk
+// Based on IS_DENORMAL macro by Jon Watte
+// This code is public domain
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <math.h>
+#include "denormals.h"
+
+/* fpclassify() is C99, cannot be compiled into a C++90 file (on some systems) */
+float undenormalise( float f )
+{
+    if( fpclassify( f ) == FP_SUBNORMAL  )
+        return 0.0;
+    return f;
+}