improve the "ignore redefinition" in ClassPath. The first should win.

src/de/inetsoftware/jwebassembly/module/FunctionManager.java

@@ -61,6 +61,17 @@ public class FunctionManager {
         return state;
     }
 
+    /**
+     * Check if this function is already known/registered.
+     * 
+     * @param name
+     *            the function name
+     * @return true, if known
+     */
+    boolean isKnown( FunctionName name ) {
+        return states.get( name ) != null;
+    }
+
     /**
      * Mark the a function as a import function. Only if the function is also needed then it will imported from
      * compiler.

src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java

@@ -367,8 +367,12 @@ public class ModuleGenerator {
     private void prepareMethod( MethodInfo method ) throws WasmException {
         try {
             FunctionName name = new FunctionName( method );
+            if( functions.isKnown( name ) ) {
+                return;
+            }
             Map<String,Object> annotationValues;
             if( (annotationValues = method.getAnnotation( JWebAssembly.REPLACE_ANNOTATION )) != null ) {
+                functions.isStatic( name ); // register this class that process the annotation of this replacement function not a second time. iSKnown() returns true now.
                 String signatureName = (String)annotationValues.get( "value" );
                 name = new FunctionName( signatureName );
                 functions.addReplacement( name, method );