Propagate ZXing version so we can do build-time checks with it

src/config-kitinerary.h.cmake

@@ -16,6 +16,11 @@
 #define KPOPPLER_VERSION ((@POPPLER_VERSION_MAJOR@<<16)|(@POPPLER_VERSION_MINOR@<<8)|(@POPPLER_VERSION_PATCH@))
 
 #cmakedefine HAVE_ZXING
+#define ZXING_VERSION_STRING "@ZXing_VERSION@"
+#define ZXING_VERSION_MAJOR @ZXing_VERSION_MAJOR@
+#define ZXING_VERSION_MINOR @ZXing_VERSION_MINOR@
+#define ZXING_VERSION_PATCH @ZXing_VERSION_PATCH@
+#define ZXING_VERSION ((@ZXing_VERSION_MAJOR@<<16)|(@ZXing_VERSION_MINOR@<<8)|(@ZXing_VERSION_PATCH@))
 
 #cmakedefine HAVE_KCAL
 #cmakedefine HAVE_LIBXML2

src/extractorcapabilities.cpp

@@ -47,7 +47,7 @@ QString ExtractorCapabilities::capabilitiesString()
 
         "Barcode decoder     : "
 #ifdef HAVE_ZXING
-            "zxing"
+            "zxing (" ZXING_VERSION_STRING ")"
 #else
             "not available"
 #endif