AbstractLocationResolver: assert that at least one scheme is set.

Author: gab1one

src/main/java/org/scijava/io/location/resolve/AbstractLocationResolver.java

@@ -51,6 +51,7 @@ public abstract class AbstractLocationResolver extends
 	 * @param schemes the uri schmemes that the implementing sub-type supports
 	 */
 	public AbstractLocationResolver(String... schemes) {
+		assert schemes.length > 0;
 		this.schemes = schemes;
 	}