changed getblock function to just check beginning of block

BlendFile/Reader.cs

@@ -49,12 +49,22 @@ public class Reader {
     /// </summary>
     /// <param name="memAddr">memory address in current system endianness</param>
     /// <returns>A <see cref="Kaitai.BlendFile.FileBlock"/> object</returns>
+    /*
     public FileBlock? GetBlock(long memAddr) {
         var blocks = OrderedBlocks.Where(x =>
             memAddr >= x.MemAddr.ToPointer() && memAddr < x.MemAddr.ToPointer() + x.LenBody);
 
         return blocks.MaxBy(x => x.LenBody);
     }
+    */
+
+    public FileBlock? GetBlock(long memAddr)
+    { 
+        return OrderedBlocks.FirstOrDefault(x => x.MemAddr.ToMemAddr() == memAddr);
+        
+    }
+    
+    
 
     /// <summary>
     /// Creates a new instance of the <see cref="Reader"/> class