Kill bashism in testheaders.sh

Detected by NetBSD Project pkgsrc app.

diff --git a/test-suite/testheaders.sh b/test-suite/testheaders.sh
index fe250e564e90d2789bebdc7eab665ff91e34e616..6ab0bde5e6b37e68cf1679f626196794d5db2e1b 100755 (executable)
--- a/test-suite/testheaders.sh
+++ b/test-suite/testheaders.sh
@@ -10,7 +10,7 @@
 #
 cc="${1}"
 
-if [ "${2}" == "" ]; then
+if test "${2}" = ""; then
        dir="."
 else
        dir="${2}"