Fix possible colorization problem

When we set "UseOriginalColors" to true, it is possible that we cant
calculate the exact number of diffuse colors, because the "applyShape"
method optimized the shape somewhat. That operations could remove faces.

To fix this for now, we simply set the shape without further optimizations.

src/Mod/Arch/ArchFence.py

@@ -117,8 +117,7 @@ class _Fence(ArchComponent.Component):
 
         self.sectionFaceNumbers = sectionFaceNumbers
 
-        self.applyShape(obj, compound, obj.Placement,
-                        allowinvalid=True, allownosolid=True)
+        obj.Shape = compound
 
     def calculateNumberOfSections(self, pathLength, sectionLength, postLength):
         withoutLastPost = pathLength - postLength
@@ -325,7 +324,7 @@ class _ViewProviderFence(ArchComponent.ViewProviderComponent):
             # 2. "Set colors" was called on the tip and the individual faces where colorized.
             #   We use the diffuseColors of the tip in that case
             tipColors = obj.Tip.ViewObject.DiffuseColor
-            
+
             if len(tipColors) > 1:
                 colors = tipColors
 
@@ -470,3 +469,5 @@ if __name__ == '__main__':
     colorizeFaces(post)
 
     print(makeFence(section, post, path))
+
+    # _CommandFence().Activated()