Compiler warnings.

src/app/valentina/mainwindow.cpp

@@ -5385,7 +5385,7 @@ bool MainWindow::LoadPattern(QString fileName, const QString& customMeasureFile)
     {
         // Quick reading measurements
         doc->setXMLContent(fileName);
-        const int currentFormatVersion = doc->GetFormatVersion(doc->GetFormatVersionStr());
+        const unsigned currentFormatVersion = doc->GetFormatVersion(doc->GetFormatVersionStr());
         if (currentFormatVersion != VPatternConverter::PatternMaxVer)
         { // Because we rely on the fact that we know where is path to measurements optimization available only for
           // the latest format version

src/libs/vlayout/warnings.pri

@@ -38,6 +38,9 @@ unix {
                 QMAKE_LFLAGS += -fsanitize=undefined
             }
         }
+
+        QMAKE_CXXFLAGS += \
+            -Wno-stringop-overflow
     }
 
     *clang*{