X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=sam.c;fp=sam.c;h=45cb05cf3dd6f8a04acfd4dd92c8d250835855a2;hb=d47b585df138ea52940ee1d61df4d990fb44f9d6;hp=d53aa0eacd47b24ebf74629e7d15c5d88a6cfcc6;hpb=b276050eeeea3a0f85ff193410bcb81f5b7a588b;p=samtools.git

diff --git a/sam.c b/sam.c
index d53aa0e..45cb05c 100644
--- a/sam.c
+++ b/sam.c
@@ -26,6 +26,7 @@ static void append_header_text(bam_header_t *header, char* text, int len)
 {
 	int x = header->l_text + 1;
 	int y = header->l_text + len + 1; // 1 byte null
+	if (text == 0) return;
 	kroundup32(x); 
 	kroundup32(y);
 	if (x < y) header->text = (char*)realloc(header->text, y);