Fix buffer overflow on edgecases with git repo subpaths

Occasionally, a subpath will have just the right number of characters to
cause a round-up, which causes a buffer overflow in the ellipt function
when copying in the backend half of the string. This was causing
overwrite of the branchname char 0 with `\0`, resulting in the
branchname output being empty in the PS1.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/common.c b/src/common.c
index 60c6c42..8423c17 100644
--- a/src/common.c
+++ b/src/common.c
@@ -42,5 +42,6 @@ void ellipt(char* buf, char* outbuf, int size) {
   strncpy(outbuf, buf, (size/2)-3);
   strcat(outbuf, "...");
   // Copy in the back end
-  strcpy(&outbuf[(size/2)], &buf[buflen - size/2]);
+  // NOTE: Extra +1 for rounding errors to prevent buffer overflows
+  strcpy(&outbuf[(size/2)], &buf[buflen - (size/2) +1]);
 }