Fix set but unused variable warning

Change-Id: I23fb9abf2b9462c939d4d9caf699e48ffded3bb4
Reviewed-on: https://gerrit.libreoffice.org/21505
Reviewed-by: jan iversen <jani@documentfoundation.org>
Tested-by: jan iversen <jani@documentfoundation.org>

l10ntools/source/srclex.l

@@ -234,10 +234,8 @@ void yyerror( const char *s )
 }
 
 SAL_IMPLEMENT_MAIN_WITH_ARGS(argc, argv) {
-    int e;
     yyin = init(argc, argv);
     yylex();
-    e = GetError();
     Close();
     return EXIT_SUCCESS;
 }