Cleanup: Clang-Tidy bugprone-copy-constructor-init fix

No expected functional changes.

.clang-tidy

@@ -28,6 +28,5 @@ Checks:  >
 
   -bugprone-sizeof-expression,
   -bugprone-integer-division,
-  -bugprone-copy-constructor-init,
 
 WarningsAsErrors: '*'

source/blender/freestyle/intern/stroke/Stroke.cpp

@@ -423,7 +423,7 @@ Stroke::Stroke()
   _rep = NULL;
 }
 
-Stroke::Stroke(const Stroke &iBrother)
+Stroke::Stroke(const Stroke &iBrother) : Interface1D(iBrother)
 {
   for (vertex_container::const_iterator v = iBrother._Vertices.begin(),
                                         vend = iBrother._Vertices.end();