Automatic merge of T1.5.1-757-gef6c1a8c8 and 17 pull requests

- Pull request #570 at 3539862: Experimental glTF 2.0 support with PBR lighting
- Pull request #839 at d00beb9: First phase of https://blueprints.launchpad.net/or/+spec/additional-cruise-control-parameters
- Pull request #874 at f8dbeab: Dynamic brake controller refactoring
- Pull request #875 at 43bf33e: Bug fix for https://bugs.launchpad.net/or/+bug/2036346 Player train switching doesn't work with 3D cabs
- Pull request #876 at f92de76: docs: add source for documents previously on website to source Documentation folder
- Pull request #882 at a055bca: Blueprint/train car operations UI window
- Pull request #885 at c81447b: feat: Add notifications to Menu
- Pull request #886 at 167e2e4: Scene viewer extension to TrackViewer
- Pull request #888 at d7daf62: docs: Document player application model
- Pull request #890 at 39a9fa4: Allow depart early
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #893 at bf8876b: Signal errors
- Pull request #894 at 5ff1e73: Correct Decrease Colour
- Pull request #896 at 5866028: First implementation of https://blueprints.launchpad.net/or/+spec/specific-sounds-for-ai-trains
- Pull request #897 at 0a9d939: feat: Improved system information collection
- Pull request #898 at e271395: Extra line with all the arguments for debugging purposes in logfile
- Pull request #900 at 42ea7ad: DMI updates

Author: openrails-bot

Source/Orts.Formats.Msts/CabViewFile.cs

@@ -894,12 +894,20 @@ public CVCDigital(STFReader stf, string basepath)
                     }),
                 new STFReader.TokenProcessor("decreasecolour", ()=>{
                     stf.MustMatch("(");
-                    stf.ReadInt(0);
+                    int NumColor = stf.ReadInt(0);
                     if(stf.EndOfBlock() == false)
                     {
+                        if (NumColor == 0)
+                        {
+                            // no. of colors is set as 0 and therefor no color is defined, but if set anyway, it must be skipped
+                            stf.SkipRestOfBlock();
+                        }
+                        else
+                        {
                         stf.ParseBlock(new STFReader.TokenProcessor[] {
                             new STFReader.TokenProcessor("controlcolour", ()=>{ DecreaseColor = ParseControlColor(stf); }) });
                     }
+                    }
                 }),
                 new STFReader.TokenProcessor("ortsfont", ()=>{ParseFont(stf); }),
                 new STFReader.TokenProcessor("ortsangle", () => {Rotation = ParseRotation(stf); }),