coccinelle: add coccinelle script for empty_or_dash() use

diff --git a/coccinelle/empty-or-dash.cocci b/coccinelle/empty-or-dash.cocci
new file mode 100644 (file)
index 0000000..bebaead
--- /dev/null
+++ b/coccinelle/empty-or-dash.cocci
@@ -0,0 +1,5 @@
+@@
+expression s;
+@@
+- (isempty(s) || streq(s, "-"))
++ empty_or_dash(s)