mshtml: Void functions should not return a value

[Andrew Talbot]

Changelog:
    Void functions should not return a value.

diff -urN a/dlls/mshtml/task.c b/dlls/mshtml/task.c
--- a/dlls/mshtml/task.c	2007-02-12 15:25:43.000000000 +0000
+++ b/dlls/mshtml/task.c	2007-04-09 10:40:16.000000000 +0100
@@ -227,13 +227,17 @@
 {
     switch(task->task_id) {
     case TASK_SETDOWNLOADSTATE:
-        return set_downloading(task->doc);
+        set_downloading(task->doc);
+        break;
     case TASK_PARSECOMPLETE:
-        return set_parsecomplete(task->doc);
+        set_parsecomplete(task->doc);
+        break;
     case TASK_SETPROGRESS:
-        return set_progress(task->doc);
+        set_progress(task->doc);
+        break;
     case TASK_START_BINDING:
-        return task_start_binding(task->bscallback);
+        task_start_binding(task->bscallback);
+        break;
     default:
         ERR("Wrong task_id %d\n", task->task_id);
     }