Lazy generator class names from the LVTRenamer.

Stops exec being spammed with class ids when we don't care about them as we're using JVN in Fernflower.

Author: LexManos

src/main/java/de/oceanlabs/mcp/mcinjector/MCInjectorImpl.java

@@ -370,12 +370,13 @@ public void saveMap(String mapFile) throws IOException
         }
     }
 
-    public String getMarker(String cls)
+    public String getMarker(String cls){ return getMarker(cls, true); }
+    public String getMarker(String cls, boolean allowGen)
     {
         String marker = this.mappings.getProperty(cls);
         if (marker == null)
         {
-            if (!this.generate) return null;
+            if (!this.generate || !allowGen) return null;
             marker = String.format("CL_%08d", this.classIDIndex++);
         }
         outMappings.put(cls, marker);

src/main/java/de/oceanlabs/mcp/mcinjector/adaptors/LVTRenamer.java

@@ -48,7 +48,7 @@ public void visitEnd() {
         String suffix = null;
         if (isInMethod)
         {
-            String tmp = mci.getMarker(className);
+            String tmp = mci.getMarker(className, false);
             if (tmp != null) {
                 tmp = tmp.replace("CL_", "");
                 while (tmp.charAt(0) == '0')