TurboJPEG: Handle JERR_BMP*,JERR_PPM* error codes

... in tjLoadImage()/tjSaveImage().  These error codes require an add-on
message table, and if it isn't initialized, then format_message()
produces "Bogus message code XXXX" instead.

ChangeLog.md

@@ -25,6 +25,11 @@ the underlying library, and because it did not involve any out-of-bounds reads
 or other exploitable behaviors, it was not believed to represent a security
 threat.
 
+3. Fixed an issue whereby the `tjLoadImage()` and `tjSaveImage()` functions
+would produce a "Bogus message code" error message if the underlying bitmap and
+PPM readers/writers threw an error that was specific to the readers/writers
+(as opposed to a general libjpeg API error.)
+
 
 1.5.90 (2.0 beta1)
 ==================

turbojpeg.c

@@ -65,6 +65,12 @@ struct my_error_mgr {
 };
 typedef struct my_error_mgr *my_error_ptr;
 
+#define JMESSAGE(code, string)  string,
+static const char *turbojpeg_message_table[] = {
+#include "cderror.h"
+  NULL
+};
+
 static void my_error_exit(j_common_ptr cinfo)
 {
   my_error_ptr myerr = (my_error_ptr)cinfo->err;
@@ -431,6 +437,9 @@ static tjhandle _tjInitCompress(tjinstance *this)
   this->jerr.pub.output_message = my_output_message;
   this->jerr.emit_message = this->jerr.pub.emit_message;
   this->jerr.pub.emit_message = my_emit_message;
+  this->jerr.pub.addon_message_table = turbojpeg_message_table;
+  this->jerr.pub.first_addon_message = JMSG_FIRSTADDONCODE;
+  this->jerr.pub.last_addon_message = JMSG_LASTADDONCODE;
 
   if (setjmp(this->jerr.setjmp_buffer)) {
     /* If we get here, the JPEG code has signaled an error. */
@@ -1087,6 +1096,9 @@ static tjhandle _tjInitDecompress(tjinstance *this)
   this->jerr.pub.output_message = my_output_message;
   this->jerr.emit_message = this->jerr.pub.emit_message;
   this->jerr.pub.emit_message = my_emit_message;
+  this->jerr.pub.addon_message_table = turbojpeg_message_table;
+  this->jerr.pub.first_addon_message = JMSG_FIRSTADDONCODE;
+  this->jerr.pub.last_addon_message = JMSG_LASTADDONCODE;
 
   if (setjmp(this->jerr.setjmp_buffer)) {
     /* If we get here, the JPEG code has signaled an error. */