fix: Fix padding issue

Too much padding was added, instead of adding the remainder in padding,
the amount written was added as padding.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/matfile.c b/src/matfile.c
index 0643921..c629db0 100644
--- a/src/matfile.c
+++ b/src/matfile.c
@@ -39,7 +39,7 @@ bool write_data(FILE *file, const mData_t data) {
     const size_t  padding           = data.tag.size % 8;
     const uint8_t padding_buffer[8] = {0};
     if (padding > 0 && success) {
-        success = (fwrite((const void *)padding_buffer, 1, padding, file) == padding) && success;
+        success = (fwrite((const void *)padding_buffer, 1, (8 - padding), file) == padding) && success;
     }
 
     return success;