revert the changes i accidently committed

svn path=/trunk/; revision=15220

rosapps/tests/hello/hello.c

@@ -1,12 +1,8 @@
-#include <windows.h>
 #include <stdio.h>
 #include <string.h>
 
 int main(int argc, char* argv[])
 {
-   WCHAR str[255];
-   
-   wsprintfW(str, L"%04X", 0xab34);
-   printf("%S\n", str);
+   printf("Hello world\n");
    return(0);
 }