Disabled compiler warnings.

sql/ha_archive.cc:
  Fixed a warning from unused computed value. This block is
  only used in debug mode and changes nothing.
support-files/compiler_warnings.supp:
  Disabled a warning from BDB.

sql/ha_archive.cc

@@ -749,10 +749,12 @@ int ha_archive::write_row(byte *buf)
     DBUG_PRINT("archive",("MyPack is %d\n", (*field)->data_length((char*) buf + (*field)->offset())));
     if ((*field)->real_type() == MYSQL_TYPE_VARCHAR) 
     {
+#ifndef DBUG_OFF
       uint actual_length= (*field)->data_length((char*) buf + (*field)->offset());
-      IF_DBUG(uint offset=) (*field)->offset() + actual_length + 
+      uint offset= (*field)->offset() + actual_length + 
         (actual_length > 255 ? 2 : 1);
       DBUG_PRINT("archive",("Offset is %d -> %d\n", actual_length, offset));
+#endif
       /*
       if ((*field)->pack_length() + (*field)->offset() != offset)
         bzero(buf + offset, (size_t)((*field)->pack_length() + (actual_length > 255 ? 2 : 1) - (*field)->data_length));

support-files/compiler_warnings.supp

@@ -30,6 +30,7 @@ pars0lex.l: .*conversion from 'ulint' to 'int', possible loss of data.*
 .*/bdb/.* : .*empty body in an if-statement.*
 .*/bdb/.* : .*conversion from 'u?lint' to 'int', possible loss of data.*
 db_vrfy.c : .*comparison is always false due to limited range of data type.*
+dbm.c : .*'item.dsize' is used uninitialized in this function.*
 
 #
 # Ignore all conversion warnings on windows 64