LV2 Client: Fix additional comma in generated manifest

modules/juce_audio_plugin_client/juce_audio_plugin_client_LV2.cpp

@@ -1083,12 +1083,14 @@ private:
 
                 for (const auto& string : param.getAllValueStrings())
                 {
-                    const auto value = jmap ((float) counter++, 0.0f, (float) numSteps - 1.0f, min, max);
+                    const auto value = jmap ((float) counter, 0.0f, (float) numSteps - 1.0f, min, max);
 
                     os << (counter != 0 ? ", " : "") << "[\n"
                           "\t\trdfs:label \"" << string << "\" ;\n"
                           "\t\trdf:value " << value << " ;\n"
                           "\t]";
+
+                    ++counter;
                 }
             }