Trivial removal of unused variable when not on linux (bug #1753)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3118 65c4cc65-6c06-0410-ace0-fbb531ad65f3

asterisk.c

@@ -898,7 +898,9 @@ static char *cli_prompt(EditLine *el)
 				int i;
 				struct timeval tv;
 				struct tm tm;
+#ifdef linux
 				FILE *LOADAVG;
+#endif
 				int fgcolor = COLOR_WHITE, bgcolor = COLOR_BLACK;
 
 				t++;