fixed swf_Optimize(). always return positive tag hash.

diff --git a/lib/modules/swftools.c b/lib/modules/swftools.c
index e92b44f..2de52f7 100644 (file)
--- a/lib/modules/swftools.c
+++ b/lib/modules/swftools.c
@@ -944,7 +944,7 @@ static int tagHash(TAG*tag)
         a >>= 8;
         a += tag->data[t]*0xefbc35a5*b*(t+1);
     }
-    return a;
+    return a&0x7fffffff; //always return unsigned
 }
 
 void swf_Optimize(SWF*swf)