Fix main path validation. False positive double curve.

ChangeLog.txt

@@ -9,6 +9,7 @@
 - Puzzle app. Fix reading a piece name.
 - Fix warning while segmenting flipped arc.
 - Tape app. "Export from existing ..." now supports multisize measurements.
+- Fix main path validation. False positive double curve.
 
 # Valentina 0.7.51 April 18, 2022
 - Z value change for a layout piece.

src/libs/vtools/dialogs/dialogtoolbox.cpp

@@ -146,8 +146,9 @@ auto DoubleCurve(const VPieceNode &firstNode, const VPieceNode &secondNode, cons
         }
 
         // The same curve, but different modeling objects
-        if (curve1->getIdObject() != NULL_ID && curve2->getIdObject() != NULL_ID &&
-                curve1->getIdObject() == curve2->getIdObject())
+        if (curve1->getMode() == Draw::Modeling && curve2->getMode() == Draw::Modeling &&
+            curve1->getIdObject() != NULL_ID && curve2->getIdObject() != NULL_ID &&
+            curve1->getIdObject() == curve2->getIdObject())
         {
             error = QObject::tr("Leave only one copy of curve '%1'").arg(curve1->name());
             return true;