90_at.pm: avoid perl 5.26 Warning in regexp (Forum #44862)

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@10048 2b470e98-0d58-463d-a4d8-8e2adae1ed80

fhem/FHEM/90_at.pm

@@ -179,7 +179,7 @@ at_Exec($)
   $data{AT_TRIGGERTIME} = $hash->{TRIGGERTIME} if($def =~ m/^\+/);
 
   if($count) {
-    $def =~ s/{\d+}/{$count}/ if($def =~ m/^\+?\*{\d+}/);  # Replace the count
+    $def =~ s/\{\d+\}/{$count}/ if($def =~ m/^\+?\*\{\d+\}/); # Replace count
     Log3 $name, 5, "redefine at command $name as $def";
 
     $data{AT_RECOMPUTE} = 1;             # Tell sunrise compute the next day