Trade: expand SceneConverterFeature to 64 bits.

We'll need many MANY more than just 8 bits for the generic export.

src/Magnum/Trade/AbstractSceneConverter.cpp

@@ -215,7 +215,7 @@ Debug& operator<<(Debug& debug, const SceneConverterFeature value) {
         /* LCOV_EXCL_STOP */
     }
 
-    return debug << "(" << Debug::nospace << reinterpret_cast<void*>(UnsignedByte(value)) << Debug::nospace << ")";
+    return debug << "(" << Debug::nospace << reinterpret_cast<void*>(UnsignedLong(value)) << Debug::nospace << ")";
 }
 
 Debug& operator<<(Debug& debug, const SceneConverterFeatures value) {

src/Magnum/Trade/AbstractSceneConverter.h

@@ -53,7 +53,7 @@ namespace Magnum { namespace Trade {
 
 @see @ref SceneConverterFeatures, @ref AbstractSceneConverter::features()
 */
-enum class SceneConverterFeature: UnsignedByte {
+enum class SceneConverterFeature: UnsignedLong {
     /**
      * Convert a mesh with
      * @ref AbstractSceneConverter::convert(const MeshData&).

src/Magnum/Trade/Test/AbstractSceneConverterTest.cpp

@@ -186,7 +186,7 @@ void AbstractSceneConverterTest::thingNotSupported() {
     struct: AbstractSceneConverter {
         SceneConverterFeatures doFeatures() const override {
             /* Assuming this bit is unused */
-            return SceneConverterFeature(1 << 7);
+            return SceneConverterFeature(1ull << 63);
         }
     } converter;
 
@@ -539,8 +539,16 @@ void AbstractSceneConverterTest::convertMeshToFileNotImplemented() {
 void AbstractSceneConverterTest::debugFeature() {
     std::ostringstream out;
 
-    Debug{&out} << SceneConverterFeature::ConvertMeshInPlace << SceneConverterFeature(0xf0);
-    CORRADE_COMPARE(out.str(), "Trade::SceneConverterFeature::ConvertMeshInPlace Trade::SceneConverterFeature(0xf0)\n");
+    Debug{&out} << SceneConverterFeature::ConvertMeshInPlace << SceneConverterFeature(0xbafabafadeaddead);
+    {
+        #ifdef CORRADE_TARGET_32BIT
+        CORRADE_EXPECT_FAIL("Debug has shitty hex printing currently, using just the low 32 bits on 32-bit platforms.");
+        #endif
+        CORRADE_COMPARE(out.str(), "Trade::SceneConverterFeature::ConvertMeshInPlace Trade::SceneConverterFeature(0xbafabafadeaddead)\n");
+    }
+    #ifdef CORRADE_TARGET_32BIT
+    CORRADE_COMPARE(out.str(), "Trade::SceneConverterFeature::ConvertMeshInPlace Trade::SceneConverterFeature(0xdeaddead)\n");
+    #endif
 }
 
 void AbstractSceneConverterTest::debugFeatures() {