* fix typo in comment

compiler/ncal.pas

@@ -58,7 +58,7 @@ interface
                                    (to prevent it from potentially happening again in a wrong context in case of constant propagation or so) }
          cnf_ignore_visibility,  { internally generated call that should ignore visibility checks }
          cnf_check_fpu_exceptions, { after the call fpu exceptions shall be checked }
-         cnf_ignore_devirt_wpo   { ignore this call for devirtualisatio info tracking: calls to newinstance generated by the compiler do not result in extra class types being instanced }
+         cnf_ignore_devirt_wpo   { ignore this call for devirtualisation info tracking: calls to newinstance generated by the compiler do not result in extra class types being instanced }
        );
        tcallnodeflags = set of tcallnodeflag;