Internals: Fix cppcheck warning including missing init.

include/verilated_vpi.cpp

@@ -1993,7 +1993,7 @@ PLI_INT32 vpi_chk_error(p_vpi_error_info error_info_p) {
     }
     if (!_error_info_p) return 0;  // no error occured
     return _error_info_p->level;  // return error severity level
-};
+}
 
 PLI_INT32 vpi_free_object(vpiHandle object) {
     VerilatedVpiImp::assertOneCheck();