wine build: "exit 1" on hash/sig failure

contrib/build-wine/prepare-wine.sh

@@ -28,18 +28,18 @@ verify_signature() {
         return 0
     else
         echo "$out" >&2
-        exit 0
+        exit 1
     fi
 }
 
 verify_hash() {
-    local file=$1 expected_hash=$2 out=
+    local file=$1 expected_hash=$2
     actual_hash=$(sha256sum $file | awk '{print $1}')
     if [ "$actual_hash" == "$expected_hash" ]; then
         return 0
     else
         echo "$file $actual_hash (unexpected hash)" >&2
-        exit 0
+        exit 1
     fi
 }
 
@@ -117,4 +117,4 @@ cp libusb/MS32/dll/libusb-1.0.dll $WINEPREFIX/drive_c/python$PYTHON_VERSION/
 # add dlls needed for pyinstaller:
 cp $WINEPREFIX/drive_c/python$PYTHON_VERSION/Lib/site-packages/PyQt5/Qt/bin/* $WINEPREFIX/drive_c/python$PYTHON_VERSION/
 
-echo "Wine is configured. Please run prepare-pyinstaller.sh"
+echo "Wine is configured."