IPCCompiler: Default initialize all parameter member variables

PVS Studio static analysis noticed we didn't initialize these in a
bunch of cases. This change fixes that so we will always initialize
these using universal initialization.

Meta/Lagom/Tools/CodeGenerators/IPCCompiler/main.cpp

@@ -462,7 +462,7 @@ private:
                 parameter_generator.set("parameter.type", parameter.type);
                 parameter_generator.set("parameter.name", parameter.name);
                 parameter_generator.append(R"~~~(
-    @parameter.type@ m_@parameter.name@;
+    @parameter.type@ m_@parameter.name@ {};
 )~~~");
             }