#1297 fix List.get returning NULL

I do not think this is #1297 related but I found this while
investigating #1297

Author: jantje

io.sloeber.core/src/io/sloeber/core/tools/Helpers.java

@@ -76,6 +76,9 @@ public static boolean addIncludeFolder(ICConfigurationDescription configurationD
             List<IPath> IncludePaths, boolean isWorkspacePath) {
 
         boolean confDesckMustBeSet = false;
+        if (IncludePaths == null) {
+            return false;
+        }
         ICLanguageSetting[] languageSettings = configurationDescription.getRootFolderDescription()
                 .getLanguageSettings();
         int pathSetting = ICSettingEntry.VALUE_WORKSPACE_PATH;

io.sloeber.core/src/io/sloeber/core/tools/Libraries.java

@@ -449,7 +449,7 @@ public static boolean adjustProjectDescription(ICConfigurationDescription confde
         List<IPath> foldersToAddToInclude = foldersToInclude.get(INCLUDE);
         boolean descriptionMustBeSet = Helpers.addIncludeFolder(confdesc, foldersToAddToInclude, true);
         List<IPath> foldersToRemoveFromBuildPath = foldersToInclude.get(REMOVE);
-        if (!foldersToRemoveFromBuildPath.isEmpty()) {
+        if ((foldersToRemoveFromBuildPath != null) && (!foldersToRemoveFromBuildPath.isEmpty())) {
             ICResourceDescription cfgd = confdesc.getResourceDescription(new Path(new String()), true);
             ICSourceEntry[] sourceEntries = cfgd.getConfiguration().getSourceEntries();
             for (IPath curFile : foldersToRemoveFromBuildPath) {