[ci skip] CI_Image_lib to set gd.jpeg_ignore_warning = 1

See #4967
diff --git a/system/libraries/Image_lib.php b/system/libraries/Image_lib.php
index 9ec44da..88c9e7e 100644
--- a/system/libraries/Image_lib.php
+++ b/system/libraries/Image_lib.php
@@ -392,6 +392,16 @@
 			$this->initialize($props);
 		}
 
+		/**
+		 * A work-around for some improperly formatted, but
+		 * usable JPEGs; known to be produced by Samsung
+		 * smartphones' front-facing cameras.
+		 *
+		 * @see	https://github.com/bcit-ci/CodeIgniter/issues/4967
+		 * @see	https://bugs.php.net/bug.php?id=72404
+		 */
+		ini_set('gd.jpeg_ignore_warning', 1);
+
 		log_message('info', 'Image Lib Class Initialized');
 	}