error path dbl free in cdiff.c

ChangeLog

@@ -1,3 +1,8 @@
+Fri Dec 17 17:10:46 CET 2010 (acab)
+-----------------------------------
+ * shared/cdiff.c: Fix error path double free - missed in 4bc4581d
+		   thanks Michael Tautschnig <mt*debian.org>
+
 Fri Dec 17 14:21:21 CET 2010 (acab)
 -----------------------------------
  * clamav-milter/whitelist.c, clamscan/manager.c, libclamav/sis.c:

shared/cdiff.c

@@ -995,8 +995,16 @@ int cdiff_apply(int fd, unsigned short mode)
 			logg("!cdiff_apply: Can't resize line buffer to %d bytes\n", line_size);
 			cdiff_ctx_free(&ctx);
 			fclose(fh);
-			free(line);
-			free(lbuf);
+			if(!r1 && !r2) {
+			    free(line);
+			    free(lbuf);
+			} else if(!r1) {
+			    free(line);
+			    free(r2);
+			} else {
+			    free(r1);
+			    free(lbuf);
+			}
 			return -1;
 		    }
 		    line = r1;