[core] expose chunkqueue_remove_empty_chunks()

expose chunkqueue_remove_empty_chunks() for use in error recovery
when aborting a chunkqueue_append_buffer_open*()

src/chunk.c

@@ -506,9 +506,6 @@ void chunkqueue_append_buffer_commit(chunkqueue *cq) {
 }
 
 
-static void chunkqueue_remove_empty_chunks(chunkqueue *cq);
-
-
 char * chunkqueue_get_memory(chunkqueue * const restrict cq, size_t * const restrict len) {
 	size_t sz = *len ? *len : (chunk_buf_sz >> 1);
 	buffer *b;
@@ -1082,7 +1079,7 @@ void chunkqueue_remove_finished_chunks(chunkqueue *cq) {
     }
 }
 
-static void chunkqueue_remove_empty_chunks(chunkqueue *cq) {
+void chunkqueue_remove_empty_chunks(chunkqueue *cq) {
 	chunk *c;
 	chunkqueue_remove_finished_chunks(cq);
 

src/chunk.h

@@ -141,6 +141,9 @@ void chunkqueue_mark_written(chunkqueue *cq, off_t len);
 
 void chunkqueue_remove_finished_chunks(chunkqueue *cq);
 
+__attribute_cold__
+void chunkqueue_remove_empty_chunks(chunkqueue *cq);
+
 void chunkqueue_steal(chunkqueue * restrict dest, chunkqueue * restrict src, off_t len);
 int chunkqueue_steal_with_tempfiles(chunkqueue * restrict dest, chunkqueue * restrict src, off_t len, struct log_error_st * const restrict errh);
 void chunkqueue_append_cq_range (chunkqueue *dst, const chunkqueue *src, off_t offset, off_t len);

src/h2.c

@@ -2464,7 +2464,7 @@ h2_send_cqdata (request_st * const r, connection * const con, chunkqueue * const
             }
 
             /*(else remove empty last chunk and fall through to below)*/
-            chunkqueue_remove_finished_chunks(cq);
+            chunkqueue_remove_empty_chunks(cq);
         }
 
         const uint32_t len = dlen < fsize ? dlen : fsize;