Minor fix for building under dev mode when byteswapping macro header files are not available.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@78685 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_skinny.c

@@ -110,19 +110,19 @@ static char version_id[16] = "P002F202";
 #define htolel(x) (x)
 #define htoles(x) (x)
 #else
-#ifdef HAVE_BYTESWAP_H
+#if defined(HAVE_BYTESWAP_H)
 #include <byteswap.h>
 #define letohl(x) bswap_32(x)
 #define letohs(x) bswap_16(x)
 #define htolel(x) bswap_32(x)
 #define htoles(x) bswap_16(x)
-#elif HAVE_SYS_ENDIAN_SWAP16
+#elif defined(HAVE_SYS_ENDIAN_SWAP16)
 #include <sys/endian.h>
 #define letohl(x) __swap32(x)
 #define letohs(x) __swap16(x)
 #define htolel(x) __swap32(x)
 #define htoles(x) __swap16(x)
-#elif HAVE_SYS_ENDIAN_BSWAP16
+#elif defined(HAVE_SYS_ENDIAN_BSWAP16)
 #include <sys/endian.h>
 #define letohl(x) bswap32(x)
 #define letohs(x) bswap16(x)