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added libgphoto2-2.4.2 with a file listing length increase
A future version (beyond libgphoto2-2.4.3) will have this constant limit fixed: see https://sourceforge.net/tracker2/index.php?func=detail&aid=2055906&group_id=8874&atid=108874
libgphoto2-2.4.3 does not have this fix yet and libgphoto2-2.4.3 has EAPI="2", which requires =portage-2*
Increasing the constant number of images listable is the most practial way of fixing this. For an example, see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=425515

--- XRef.cc.orig	2004-09-17 23:54:38.000000000 -0700
+++ XRef.cc	2004-09-25 17:59:36.000000000 -0700
@@ -76,6 +76,12 @@
 
   // trailer is ok - read the xref table
   } else {
+    if (size*sizeof(XRefEntry)/sizeof(XRefEntry) != size) {
+      error(-1, "Invalid 'size' inside xref table.");
+      ok = gFalse;
+      errCode = errDamaged;
+      return;
+    }
     entries = (XRefEntry *)gmalloc(size * sizeof(XRefEntry));
     for (i = 0; i < size; ++i) {
       entries[i].offset = 0xffffffff;
@@ -267,6 +273,10 @@
     // table size
     if (first + n > size) {
       newSize = size + 256;
+      if (newSize*sizeof(XRefEntry)/sizeof(XRefEntry) != newSize) {
+        error(-1, "Invalid 'newSize'");
+        goto err2;
+      }
       entries = (XRefEntry *)grealloc(entries, newSize * sizeof(XRefEntry));
       for (i = size; i < newSize; ++i) {
 	entries[i].offset = 0xffffffff;
@@ -410,6 +420,10 @@
 	    if (!strncmp(p, "obj", 3)) {
 	      if (num >= size) {
 		newSize = (num + 1 + 255) & ~255;
+	        if (newSize*sizeof(XRefEntry)/sizeof(XRefEntry) != newSize) {
+	          error(-1, "Invalid 'obj' parameters.");
+	          return gFalse;
+	        }
 		entries = (XRefEntry *)
 		            grealloc(entries, newSize * sizeof(XRefEntry));
 		for (i = size; i < newSize; ++i) {
@@ -431,6 +445,11 @@
     } else if (!strncmp(p, "endstream", 9)) {
       if (streamEndsLen == streamEndsSize) {
 	streamEndsSize += 64;
+        if (streamEndsSize*sizeof(int)/sizeof(int) != streamEndsSize) {
+          error(-1, "Invalid 'endstream' parameter.");
+          return gFalse;
+        }
+
 	streamEnds = (Guint *)grealloc(streamEnds,
 				       streamEndsSize * sizeof(int));
       }
--- Catalog.cc.orig	2004-10-18 16:26:39.388666476 +0200
+++ Catalog.cc	2004-10-18 16:27:28.004749073 +0200
@@ -62,6 +62,12 @@
   }
   pagesSize = numPages0 = obj.getInt();
   obj.free();
+  if (pagesSize*sizeof(Page *)/sizeof(Page *) != pagesSize ||
+      pagesSize*sizeof(Ref)/sizeof(Ref) != pagesSize) {
+    error(-1, "Invalid 'pagesSize'");
+    ok = gFalse;
+    return;
+  }
   pages = (Page **)gmalloc(pagesSize * sizeof(Page *));
   pageRefs = (Ref *)gmalloc(pagesSize * sizeof(Ref));
   for (i = 0; i < pagesSize; ++i) {
@@ -186,6 +192,11 @@
       }
       if (start >= pagesSize) {
 	pagesSize += 32;
+        if (pagesSize*sizeof(Page *)/sizeof(Page *) != pagesSize ||
+            pagesSize*sizeof(Ref)/sizeof(Ref) != pagesSize) {
+          error(-1, "Invalid 'pagesSize' parameter.");
+          goto err3;
+        }
 	pages = (Page **)grealloc(pages, pagesSize * sizeof(Page *));
 	pageRefs = (Ref *)grealloc(pageRefs, pagesSize * sizeof(Ref));
 	for (j = pagesSize - 32; j < pagesSize; ++j) {