Fixed a crashing bug

There was a segfault generating bug when estimating the maximum group size in exec_command.

diff --git a/finddup.c b/finddup.c
index 6f6af38..7f22313 100644 (file)
--- a/finddup.c
+++ b/finddup.c
@@ -337,7 +337,7 @@ void exec_command(int nb, struct file_node **nodes) {
   pid_t pid;
 
   for(n = 0; n < nb; n++) {
-    if(nodes[n]->group_id != nodes[n-1]->group_id) {
+    if(n > 0 && nodes[n]->group_id != nodes[n-1]->group_id) {
       group_size = 0;
     }
     group_size++;