build_matrix.sh: Fix a shellcheck note

The note was:
Double quote to prevent globbing and word splitting. [SC2086]

[skip ci]

diff --git a/build_matrix.sh b/build_matrix.sh
index 3089bad9227630a952252de643a9709e04993885..08359f7e0bc04673e0658003576af8ed25037c43 100755 (executable)
--- a/build_matrix.sh
+++ b/build_matrix.sh
@@ -49,7 +49,7 @@ build_tcpdump() {
             export CRYPTO
             for SMB in $MATRIX_SMB; do
                 export SMB
-                COUNT=`increment $COUNT`
+                COUNT=`increment "$COUNT"`
                 echo_magenta "===== SETUP $COUNT: BUILD_LIBPCAP=$BUILD_LIBPCAP REMOTE=${REMOTE:-?} CC=$CC CMAKE=$CMAKE CRYPTO=$CRYPTO SMB=$SMB =====" >&2
                 # Run one build with setup environment variables:
                 # BUILD_LIBPCAP, REMOTE, CC, CMAKE, CRYPTO and SMB