fix(ReDeathmatch): fix round mode switch condition

Fixes an issue where the round mode switch condition was not working as intended in the ReDeathmatch script. The previous condition only checked if the `redm_modes_switch` variable was equal to "disable", but it should also exclude cases where `redm_modes_switch` is a non-zero value. This fix adds an additional check to exclude non-zero values of `redm_modes_switch`.

cstrike/addons/amxmodx/scripting/ReDeathmatch/ReDM_round_modes.inc

@@ -47,7 +47,7 @@ RoundModes_ReadModes() {
  * Handles mode voting and mode switching.
  */
 RoundModes_RoundEnd() {
-    if (strcmp(redm_modes_switch, "disable") == 0)
+    if (strcmp(redm_modes_switch, "disable") == 0 || strtol(redm_modes_switch) == 0)
         return
 
     new count