[Bug 148003] [New Class Wizard] Browse for Folder can cause infinite loop

Problem reason: loop inside of NewClassWizardUtil.getSourceFolder().

After "path.removeLastSegments(1)" deletes the last segment, path
would contain "\", because (separators & HAS_LEADING) != 0)
So, "path.isEmpty()" treats it as root path and returns false.
That's why loop became infinite.

Fix:

-        while (!path.isEmpty()) {
+        while (path.segmentCount() > 0) {

core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/wizards/classwizard/NewClassWizardUtil.java

@@ -82,7 +82,7 @@ public class NewClassWizardUtil {
     public static ICContainer getSourceFolder(IPath path) {
         if (path == null)
             return null;
-        while (!path.isEmpty()) {
+        while (path.segmentCount() > 0) {
             IResource res = getWorkspaceRoot().findMember(path);
             if (res != null && res.exists()) {
                 int resType = res.getType();