Description: Fix warnings: remove unsigned < 0 tests that are always false
Origin: git://git.ghostscript.com/jbig2dec.git;a=commit;h=9d2c4f3
Author: Tor Andersson <tor.andersson@artifex.com>
Forwarded: yes
Last-Update: 2017-01-23

--- a/jbig2_image.c
+++ b/jbig2_image.c
@@ -256,7 +256,7 @@
     /* general OR case */
     s = ss;
     d = dd = dst->data + y * dst->stride + leftbyte;
-    if (d < dst->data || leftbyte > dst->stride || h * dst->stride < 0 || d - leftbyte + h * dst->stride > dst->data + dst->height * dst->stride) {
+    if (d < dst->data || leftbyte > dst->stride || d - leftbyte + h * dst->stride > dst->data + dst->height * dst->stride) {
         return jbig2_error(ctx, JBIG2_SEVERITY_FATAL, -1, "preventing heap overflow in jbig2_image_compose");
     }
     if (leftbyte == rightbyte) {
--- a/jbig2_mmr.c
+++ b/jbig2_mmr.c
@@ -977,7 +977,7 @@
             if (b1 < 2)
                 break;
             if (c) {
-                if (b1 - 2 < a0 || a0 < 0)
+                if (a0 == MINUS1 || b1 - 2 < a0)
                     return -1;
                 jbig2_set_bits(dst, a0, b1 - 2);
             }
--- a/jbig2_symbol_dict.c
+++ b/jbig2_symbol_dict.c
@@ -92,11 +92,6 @@
 {
     Jbig2SymbolDict *new_dict = NULL;
 
-    if (n_symbols < 0) {
-        jbig2_error(ctx, JBIG2_SEVERITY_FATAL, -1, "Negative number of symbols in symbol dict: %d", n_symbols);
-        return NULL;
-    }
-
     new_dict = jbig2_new(ctx, Jbig2SymbolDict, 1);
     if (new_dict != NULL) {
         new_dict->glyphs = jbig2_new(ctx, Jbig2Image *, n_symbols);
@@ -613,7 +608,7 @@
             uint32_t j;
             int x;
 
-            if (code || (BMSIZE < 0)) {
+            if (code) {
                 jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number, "error decoding size of collective bitmap!");
                 goto cleanup4;
             }
@@ -716,7 +711,7 @@
                 code = jbig2_arith_int_decode(IAEX, as, (int32_t *)&exrunlength);
             /* prevent infinite loop */
             zerolength = exrunlength > 0 ? 0 : zerolength + 1;
-            if (code || (exrunlength > limit - i) || (exrunlength < 0) || (zerolength > 4) || (exflag && (exrunlength + j > params->SDNUMEXSYMS))) {
+            if (code || (exrunlength > limit - i) || (zerolength > 4) || (exflag && (exrunlength + j > params->SDNUMEXSYMS))) {
                 if (code)
                     jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number, "failed to decode exrunlength for exported symbols");
                 else if (exrunlength <= 0)