Guard a test against wc that pads its output with whitespace

diff --git a/tree-diff.c b/tree-diff.c
index 0ef06a9e36f55c0caec51064f552decd8a58be13..382092bce0be4ac82098ccc9c19d52df80f4eafd 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -263,6 +263,10 @@ void diff_tree_setup_paths(const char **p)
 
                paths = p;
                nr_paths = count_paths(paths);
+               if (nr_paths == 0) {
+                       pathlens = NULL;
+                       return;
+               }
                pathlens = xmalloc(nr_paths * sizeof(int));
                for (i=0; i<nr_paths; i++)
                        pathlens[i] = strlen(paths[i]);