SetMiterLimit: Return success: some callers check this.

diff --git a/objects/gdiobj.c b/objects/gdiobj.c
index 285d912..6ebeb91 100644
--- a/objects/gdiobj.c
+++ b/objects/gdiobj.c
@@ -1462,8 +1462,10 @@
  */
 BOOL WINAPI SetMiterLimit(HDC hdc, FLOAT eNewLimit, PFLOAT peOldLimit)
 {
-        FIXME("SetMiterLimit, stub\n");
-        return 0;
+    FIXME("(%p,%f,%p) stub\n", hdc, eNewLimit, peOldLimit);
+    if (peOldLimit)
+        *peOldLimit = 10.0; /* Default miter is 10, see msdn */
+    return TRUE;
 }
 
 /*******************************************************************