Ensure to try again if the connection failed.

Author: gab1one

src/main/java/org/scijava/io/http/HTTPHandle.java

@@ -179,8 +179,10 @@ else if (result.code() == 206) {
 				serverCanResume = true;
 			}
 			else {
-				throw new IOException("HTTP connection failure, errorcode: " + result
-					.code());
+				final int code = result.code();
+				// We set this to null to ensure we will try again later
+				this.result = null;
+				throw new IOException("HTTP connection failure, errorcode: " + code);
 			}
 		}
 		return result;