Fix SWCommandUtils.numberMapper

SpigotCore_Main/src/de/steamwar/command/SWCommandUtils.java

@@ -260,11 +260,14 @@ public class SWCommandUtils {
 
     private static <T> Function<String, T> numberMapper(Function<String, T> mapper) {
         return s -> {
+            if (s.equalsIgnoreCase("nan")) return null;
             try {
-                if (s.equalsIgnoreCase("nan")) {
-                    return null;
-                }
                 return mapper.apply(s);
+            } catch (NumberFormatException e) {
+                // Ignored
+            }
+            try {
+                return mapper.apply(s.replace(',', '.'));
             } catch (NumberFormatException e) {
                 return null;
             }