## ZF-3932: clipPolygon() and clipRectangle() in Zend_Pdf_Page don't work

### Description

clipPolygon() and clipRectangle() in Zend_Pdf_Page don't seem to work.

I think this is because they are missing the "n" command which is present in clipEllipse().

This trivial fix worked fine for me:

```
@@ -913,10 +913,10 @@
\$this->_contents .= \$path;

if (\$fillMethod == Zend_Pdf_Page::FILL_METHOD_NON_ZERO_WINDING) {
-            \$this->_contents .= " h\n W\n";
+            \$this->_contents .= "h\nW\nn\n";
} else {
// Even-Odd fill method.
-            \$this->_contents .= " h\n W*\n";
+            \$this->_contents .= "h\nW*\nn\n";
}
}

@@ -939,7 +950,7 @@

\$this->_contents .= \$x1Obj->toString() . ' ' . \$y1Obj->toString() . ' '
.      \$widthObj->toString() . ' ' . \$height2Obj->toString() . " re\n"
-                         .  " W\n";
+                         .  " W\nn\n";
}

/**
```