Add buffer length setting

I few places in PQrequestCancel() did not set the errorMessage buffer
length.  This patch fixes that.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
Index: src/interfaces/libpq/fe-connect.c
===================================================================
RCS file: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v
retrieving revision 1.286
diff -c -c -r1.286 fe-connect.c
*** src/interfaces/libpq/fe-connect.c    21 Oct 2004 20:23:19 -0000    1.286
--- src/interfaces/libpq/fe-connect.c    29 Oct 2004 17:51:13 -0000
***************
*** 2252,2257 ****
--- 2252,2258 ----
      {
          strcpy(conn->errorMessage.data,
                 "PQrequestCancel() -- socket() failed: ");
+         conn->errorMessage.len = strlen(conn->errorMessage.data);
          goto cancel_errReturn;
      }
  retry3:
***************
*** 2263,2268 ****
--- 2264,2270 ----
              goto retry3;
          strcpy(conn->errorMessage.data,
                 "PQrequestCancel() -- connect() failed: ");
+         conn->errorMessage.len = strlen(conn->errorMessage.data);
          goto cancel_errReturn;
      }

***************
*** 2285,2290 ****
--- 2287,2293 ----
              goto retry4;
          strcpy(conn->errorMessage.data,
                 "PQrequestCancel() -- send() failed: ");
+         conn->errorMessage.len = strlen(conn->errorMessage.data);
          goto cancel_errReturn;
      }