Merge "Don't increment the window count for 0-length windows."

1 files changed, 5 insertions, 3 deletions

diff --git a/syspatch.c b/syspatch.c
index c01c6a0..3d89e6a 100644
--- a/syspatch.c
+++ b/syspatch.c
@@ -196,11 +196,13 @@ static int stream_to_target_write(xd3_stream *stream, TargetWrite *tgt) {
 
 static int advance_target_buffer(xd3_stream *stream, MapState *target_state) {
     TargetWrite *tgt = WRITE_QUEUE[TARGET_WINDOWS_WRITTEN % WRITE_QUEUE_LENGTH];
-    if (write_target(tgt, target_state) != 0)
-        return -1;
+    if (tgt->length) {
+        if (write_target(tgt, target_state) != 0)
+            return -1;
+        TARGET_WINDOWS_WRITTEN += 1;
+    }
     if (stream_to_target_write(stream, tgt) != 0)
         return -1;
-    TARGET_WINDOWS_WRITTEN += 1;
     return 0;
 }