provide INT16_MIN and INT16_MAX for platforms where they are not defined.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@48959 65c4cc65-6c06-0410-ace0-fbb531ad65f3

codecs/g722/g722.h

@@ -46,6 +46,13 @@ enum
     G722_PACKED = 0x0002
 };
 
+#ifndef INT16_MAX
+#define INT16_MAX       32767
+#endif
+#ifndef INT16_MIN
+#define INT16_MIN       (-32768)
+#endif
+
 typedef struct
 {
     /*! TRUE if the operating in the special ITU test mode, with the band split filters