fix minus handling in trigger expressions in ffrontend

[dvd]

then writing trigger expression, minus sign does not accepted by php frontend. This is because arithmetic operations checked by regexp, where '-' is within body of regex, and is interpreded as character range designator.

this patch fixes it:

--- frontends/php/include/config.inc.php.orig   2005-12-07 16:50:30.000000000 +0500
+++ frontends/php/include/config.inc.php        2005-12-07 17:02:51.000000000 +0500
@@ -873,7 +873,7 @@
 //     Replace all <float> <sign> <float> <K|M|G> with 0
 //                     echo "Expression:$expression<br>";
                        $arr="";
-                       if (eregi('^((.)*)([0-9\.]+[A-Z]{0,1})[ ]*([\&\|\>\<\=\+\-\*\/\#]{1})[ ]*([0-9\.]+[A-Z]{0,1})((.)*)$', $expression, &$arr)) 
+                       if (eregi('^((.)*)([0-9\.]+[A-Z]{0,1})[ ]*([\&\|\>\<\=\+\*\/\#\-]{1})[ ]*([0-9\.]+[A-Z]{0,1})((.)*)$', $expression, &$arr)) 
                        {
 //                             echo "OK<br>";
 //                             for($i=0;$i<50;$i++)

apply with patch -p0 in zabbix source dir.