Windows/build-dependencies: Use correct logical OR operator

diff --git a/Windows/build-dependencies b/Windows/build-dependencies
index f2e9692167b3acdf55470bd2ebf0e74804346695..2ccd4841f7813d026b759c1a3d6a22b31fe36874 100755 (executable)
--- a/Windows/build-dependencies
+++ b/Windows/build-dependencies
@@ -51,7 +51,7 @@ while test $# -gt 0; do
     shift 1;
 done
 
-if test -z "$SANDBOX" || -z "$arch"; then
+if test -z "$SANDBOX" -o -z "$arch"; then
             printf "Usage: $0 --arch=<arch> --sandbox=<dir> [--tarballs=<dir>]\n";
     exit 1;
 fi