Make sure the TYPE variable is actually defined for nmake builds.

linden/scripts/linux/4-package-viewer

@@ -1,9 +1,11 @@
 #!/bin/bash
 
+source config-SL-source
+
 if [ "$OSTYPE" == "cygwin" ] ; then
     # Assumes version has been passed in from outside, coz Windows insists on adding crap to python output.
     cd ../../indra/build-nmake/
-    iscc newview/$TYPE/package/${version}-Windows-x86.iss
+    iscc newview/${TYPE}/package/${version}-Windows-x86.iss
 else
     cd ../../indra/viewer-linux-*
     make package