SGEES, parameter SELECT: add article 'a' before 'LOGICAL FUNCTION'

Author: thielema

SRC/sgees.f

@@ -80,7 +80,7 @@
 *>
 *> \param[in] SELECT
 *> \verbatim
-*>          SELECT is LOGICAL FUNCTION of two REAL arguments
+*>          SELECT is a LOGICAL FUNCTION of two REAL arguments
 *>          SELECT must be declared EXTERNAL in the calling subroutine.
 *>          If SORT = 'S', SELECT is used to select eigenvalues to sort
 *>          to the top left of the Schur form.