Added guard clause around shader data import.

Author: Lunaretic

xivModdingFramework/Materials/FileTypes/Mtrl.cs

@@ -14,6 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+using HelixToolkit.SharpDX.Core;
 using SharpDX;
 using System;
 using System.Collections.Generic;
@@ -532,9 +533,16 @@ await Task.Run((Func<Task>)(async () =>
                             var offset = shaderParam.Offset;
                             var size = shaderParam.Size;
                             shaderParam.Bytes = new List<byte>();
-                            for(var idx = offset; idx < offset + size; idx++)
+                            if (offset + size <= shaderBytes.Length)
                             {
-                                shaderParam.Bytes.Add(shaderBytes[idx]);
+                                for (var idx = offset; idx < offset + size; idx++)
+                                {
+                                    shaderParam.Bytes.Add(shaderBytes[idx]);
+                                }
+                            } else
+                            {
+                                // Just use a blank array if we have missing/invalid shader data.
+                                shaderParam.Bytes = new List<byte>(new byte[size]);
                             }
                         }