Fix comment typos in the sqldiff.c utility program.
FossilOrigin-Name: 32ab2bb990746a84f5944e3cf428fb2dff3628da
diff --git a/tool/sqldiff.c b/tool/sqldiff.c
index 9aa68ca..2b982e9 100644
--- a/tool/sqldiff.c
+++ b/tool/sqldiff.c
@@ -214,14 +214,14 @@
/*
** Return a list of column names for the table zDb.zTab. Space to
-** old the list is obtained from malloc() and should released by calling
-** namelistFree() when no longer needed.
+** hold the list is obtained from sqlite3_malloc() and should released
+** using namelistFree() when no longer needed.
**
** Primary key columns are listed first, followed by data columns. The
** "primary key" in the previous sentence is the true primary key - the
** rowid or INTEGER PRIMARY KEY for ordinary tables or the declared
** PRIMARY KEY for WITHOUT ROWID tables. The number of columns in the
-** primary key is returned in *pNPkey.
+** primary key is returned in *pnPkey.
**
** If the table is a rowid table for which the rowid is inaccessible,
** then this routine returns a NULL pointer.