ECPG: store own copy of the prepared statement name

Hi,

the attached patch makes ECPG more robust
against applications that free() strings by storing
its own copy of the prepared statement name.

Best regards,
Zoltán Böszörményi

--
Bible has answers for everything. Proof:
"But let your communication be, Yea, yea; Nay, nay: for whatsoever is more
than these cometh of evil." (Matthew 5:37) - basics of digital technology.
"May your kingdom come" - superficial description of plate tectonics

----------------------------------
Zoltán Böszörményi
Cybertec Schönig & Schönig GmbH
http://www.postgresql.at/

*** pgsql.4/src/interfaces/ecpg/ecpglib/prepare.c~    2009-10-14 15:34:46.000000000 +0200
--- pgsql.4/src/interfaces/ecpg/ecpglib/prepare.c    2009-10-14 15:34:46.000000000 +0200
***************
*** 152,158 ****
      replace_variables(&(stmt->command), lineno);

      /* add prepared statement to our list */
!     this->name = (char *) name;
      this->stmt = stmt;

      /* and finally really prepare the statement */
--- 152,158 ----
      replace_variables(&(stmt->command), lineno);

      /* add prepared statement to our list */
!     this->name = strdup(name);
      this->stmt = stmt;

      /* and finally really prepare the statement */
***************
*** 160,165 ****
--- 160,166 ----
      if (!ecpg_check_PQresult(query, stmt->lineno, stmt->connection->connection, stmt->compat))
      {
          ecpg_free(stmt->command);
+         ecpg_free(this->name);
          ecpg_free(this);
          ecpg_free(stmt);
          return false;
***************
*** 238,243 ****
--- 239,245 ----
      /* okay, free all the resources */
      ecpg_free(this->stmt->command);
      ecpg_free(this->stmt);
+     ecpg_free(this->name);
      if (prev != NULL)
          prev->next = this->next;
      else