Added missing "EXEC SQL" to statement.

Author: Michael Meskes

doc/src/sgml/ecpg.sgml

@@ -517,7 +517,7 @@ EXEC SQL COMMIT;
      </varlistentry>
 
      <varlistentry>
-      <term><literal>SET AUTOCOMMIT TO OFF</literal></term>
+      <term><literal>EXEC SQL SET AUTOCOMMIT TO OFF</literal></term>
       <listitem>
        <para>
         Disable autocommit mode.  This is the default.