Add support for OCCT 7.8.0 (#11909)

src/Mod/Part/App/ImportStep.cpp

@@ -137,7 +137,12 @@ int Part::ImportStepParts(App::Document *pcDoc, const char* Name)
                 // This is a trick to access the GUI via Python and set the color property
                 // of the associated view provider. If no GUI is up an exception is thrown
                 // and cleared immediately
+#if OCC_VERSION_HEX >= 0x070800
+                std::hash<TopoDS_Solid> hasher;
+                std::map<int, Quantity_Color>::iterator it = hash_col.find(hasher(aSolid));
+#else
                 std::map<int, Quantity_Color>::iterator it = hash_col.find(aSolid.HashCode(INT_MAX));
+#endif
                 if (it != hash_col.end()) {
                     try {
                         Py::Object obj(pcFeature->getPyObject(), true);