[JGIT PATCH 2/2] improve the handling of empty lines

[Mark Struberg <struberg@yahoo.de>]

Move the 'empty-line' check in RefDatabase#readLine down a bit after we removed all the whitespaces.
This way we consistently return null regardless if the line 
is empty or if it does only contain whitespaces.

Signed-off-by: Mark Struberg <struberg@yahoo.de>
---
 .../src/org/spearce/jgit/lib/RefDatabase.java      |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/RefDatabase.java b/org.spearce.jgit/src/org/spearce/jgit/lib/RefDatabase.java
index 477dc62..acc835b 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/RefDatabase.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/RefDatabase.java
@@ -498,14 +498,15 @@ private static String readLine(final File file)
 			throws FileNotFoundException, IOException {
 		final byte[] buf = NB.readFully(file, 4096);
 		int n = buf.length;
-		if (n == 0)
-			return null;
 		
 		// remove trailing whitespaces
 		while (n > 0 && Character.isWhitespace(buf[n - 1])) {
 			n--;
 		}
-		
+
+		if (n == 0)
+			return null;
+
 		return RawParseUtils.decode(buf, 0, n);
 	}
 
-- 
1.6.2.5