allow building with older libjpeg again

we don't really care what the error number is, so long as its an error of some
kind so just sed JERR_BAD_CROP_SPEC to JERR_CONVERSION_NOTIMPL

Change-Id: Iae41de7b720ce2e60c7092d15983aa1c4ba14c89

configure.ac

@@ -7553,17 +7553,6 @@ if test "$with_system_jpeg" = "yes"; then
         [AC_MSG_ERROR(jpeg.h not found. install libjpeg)], [])
     AC_CHECK_LIB(jpeg, jpeg_resync_to_restart, [ JPEG3RDLIB=-ljpeg ],
     [AC_MSG_CHECKING(jpeg library not found or fuctional)], [])
-    AC_MSG_CHECKING([[libjpeg supports JERR_BAD_CROP_SPEC (jpeg-7 API)]])
-    AC_COMPILE_IFELSE([ AC_LANG_SOURCE(
-              [[
-#include <stdio.h>
-#include <jerror.h>
-int main(int c, char**v) { printf("%d\n", JERR_BAD_CROP_SPEC); return 0; }
-              ]]) ],
-              [AC_MSG_RESULT(yes)],
-                  [AC_MSG_RESULT(no)
-                           AC_MSG_ERROR(jpeg library version >= 7 or jpeg-turbo version >= 1.1 required)
-                          ])
     libo_MINGW_CHECK_DLL([libjpeg])
 else
     AC_MSG_RESULT([internal])

vcl/source/filter/jpeg/transupp.c

@@ -1006,7 +1006,7 @@ jtransform_request_workspace (j_decompress_ptr srcinfo,
       info->crop_yoffset = 0;   /* default to +0 */
     if (info->crop_xoffset >= info->output_width ||
     info->crop_yoffset >= info->output_height)
-      ERREXIT(srcinfo, JERR_BAD_CROP_SPEC);
+      ERREXIT(srcinfo, JERR_CONVERSION_NOTIMPL);
     if (info->crop_width_set == JCROP_UNSET)
       info->crop_width = info->output_width - info->crop_xoffset;
     if (info->crop_height_set == JCROP_UNSET)
@@ -1016,7 +1016,7 @@ jtransform_request_workspace (j_decompress_ptr srcinfo,
     info->crop_height <= 0 || info->crop_height > info->output_height ||
     info->crop_xoffset > info->output_width - info->crop_width ||
     info->crop_yoffset > info->output_height - info->crop_height)
-      ERREXIT(srcinfo, JERR_BAD_CROP_SPEC);
+      ERREXIT(srcinfo, JERR_CONVERSION_NOTIMPL);
     /* Convert negative crop offsets into regular offsets */
     if (info->crop_xoffset_set == JCROP_NEG)
       xoffset = info->output_width - info->crop_width - info->crop_xoffset;