coverity#1019311 silence Unchecked return value

Change-Id: Ife2bfed0eecff5fe247d0fef6ee7d77626d9f0be

codemaker/source/cppumaker/cpputype.cxx

@@ -449,7 +449,7 @@ void CppuType::dumpFile(
         throw;
     }
     out.close();
-    makeValidTypeFile(
+    (void)makeValidTypeFile(
                u2b(fileUri), u2b(tmpUri), exists && options.isValid("-Gc"));
 }