Handle the printf %F format modifier.

diff --git a/dlls/msvcrt/wcs.c b/dlls/msvcrt/wcs.c
index d400f1e..66d782f 100644
--- a/dlls/msvcrt/wcs.c
+++ b/dlls/msvcrt/wcs.c
@@ -491,6 +491,8 @@
             }
             else if( *p == 'w' )
                 flags.WideString = *p++;
+            else if( *p == 'F' )
+                p++; /* ignore */
             else
                 break;
         }