fix out-of-bounds read in rastertolabel delta-row compare

Signed-off-by: Aizal Khan <aizumusheer2@gmail.com>

diff --git a/filter/rastertolabel.c b/filter/rastertolabel.c
index 0434d159e8e195c29fda59799c6dd624d67de008..bee0f2aa8ec86f65b28aee88d7eddb3b8205d1b8 100644 (file)
--- a/filter/rastertolabel.c
+++ b/filter/rastertolabel.c
@@ -953,8 +953,8 @@ PCLCompress(unsigned char *line,    /* I - Line to compress */
       * The seed buffer is valid, so compare against it...
       */
 
-      while (*line_ptr == *seed &&
-             line_ptr < line_end)
+      while (line_ptr < line_end &&
+             *line_ptr == *seed)
       {
         line_ptr ++;
         seed ++;
@@ -971,8 +971,8 @@ PCLCompress(unsigned char *line,    /* I - Line to compress */
 
       start = line_ptr;
       count = 0;
-      while (*line_ptr != *seed &&
-             line_ptr < line_end &&
+      while (line_ptr < line_end &&
+             *line_ptr != *seed &&
              count < 8)
       {
         line_ptr ++;