package/jasper: Apply fix for CVE-2018-19542

Add 0002-check-null-in-jp2_decode.patch:

Patch was proposed upstream[1] but upstream is very inactive.
Linux distributions use the same fix to patch their packages.

1: https://github.com/mdadams/jasper/pull/200
Signed-off-by: Michael Vetter <jubalh@iodoru.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 61703b82cdcbd32dd27e8a8f2de31dfa45e6a2b1)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/jasper/0002-check-null-in-jp2_decode-CVE-2018-19542.patch

@@ -0,0 +1,24 @@
+From fc62d1b7164ded2405fd6a0604548b34a5a77462 Mon Sep 17 00:00:00 2001
+From: Timothy Lyanguzov <timothy.lyanguzov@sap.com>
+Date: Mon, 18 Mar 2019 16:46:24 +1300
+Subject: [PATCH] Fix CVE-2018-19542: Check for NULL pointer in jp2_decode
+
+Signed-off-by: Michael Vetter <jubalh@iodoru.org>
+---
+ src/libjasper/jp2/jp2_dec.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/libjasper/jp2/jp2_dec.c b/src/libjasper/jp2/jp2_dec.c
+index 03b0eaf..a535c19 100644
+--- a/src/libjasper/jp2/jp2_dec.c
++++ b/src/libjasper/jp2/jp2_dec.c
+@@ -388,6 +388,9 @@ jas_image_t *jp2_decode(jas_stream_t *in, const char *optstr)
+ 				jas_image_setcmpttype(dec->image, newcmptno, jp2_getct(jas_image_clrspc(dec->image), 0, channo + 1));
+ 				}
+ #endif
++			} else {
++				jas_eprintf("error: invalid MTYP in CMAP box\n");
++				goto error;
+ 			}
+ 		}
+ 	}