Release builds generate different strangely formatted export names

for local symbols, that shouldn't be exported. This patch excludes them,
cutting down about 10,000 exported symbols and decreasing the binary size
by 20%.

src/tools/msvc/gendef.pl

@@ -2,7 +2,7 @@ my @def;
 #
 # Script that generates a .DEF file for all objects in a directory
 # 
-# $PostgreSQL: pgsql/src/tools/msvc/gendef.pl,v 1.5 2007/03/17 14:01:01 mha Exp $
+# $PostgreSQL: pgsql/src/tools/msvc/gendef.pl,v 1.6 2007/05/03 14:04:03 mha Exp $
 #
 
 die "Usage: gendef.pl <modulepath>\n" unless ($ARGV[0] =~ /\\([^\\]+$)/);
@@ -36,6 +36,7 @@ while (<$ARGV[0]/*.obj>)
         next if $pieces[6] =~ /NULL_THUNK_DATA$/;
         next if $pieces[6] =~ /^__IMPORT_DESCRIPTOR/;
         next if $pieces[6] =~ /^__NULL_IMPORT/;
+        next if $pieces[6] =~ /^\?\?_C/;
 
         push @def, $pieces[6];
     }