NASM has recently changed name of win32 pre-compiled binary.

PR: 1627

util/pl/VC-32.pl

@@ -163,7 +163,10 @@ $lfile='/out:';
 $shlib_ex_obj="";
 $app_ex_obj="setargv.obj" if ($FLAVOR !~ /CE/);
 if ($nasm) {
-	$asm='nasmw -f win32';
+	my $ver=`nasm -v`;
+	my $vew=`nasmw -v`;
+	# pick newest version
+	$asm=($ver gt $vew?"nasm":"nasmw")." -f win32";
 	$afile='-o ';
 } else {
 	$asm='ml /Cp /coff /c /Cx';