Changed the name of a local variable in the test to avoid collision with skeleton...

Changed the name of a local variable in the test to avoid collision with skeleton names.

Before tags were added to re2c, skeleton programs only used a limited
number of predefined names, such as 'yych', 'yystate', etc. With tags,
however, this is no longer true as tags may have any names. So now we need
to be more cautios when picking names for sekleton variables.

This patch is only a workaround to make all tests pass; the real solution
requires inventing a good naming scheme for skeleton programs and
regenerating all skeleton test results.