Fix margin for 1D barcodes

Since ZXingCpp v3.0.0+ changed the default from -1 to 0.

Using -1 results in an exception in `BitMatrix::setRegion()`
because of invalid top/left coordinates.

app/src/main/kotlin/de/markusfisch/android/binaryeye/fragment/EncodeFragment.kt

@@ -273,7 +273,7 @@ class EncodeFragment : Fragment() {
 					addQuietZoneSwitch.isChecked
 				) 1 else 0
 
-				else -> -1
+				else -> 0
 			},
 			if (format.canBeInverted()) {
 				colorsSpinner.selectedItemPosition