Index: C:/Home/jstuyts/dev/wsp/hippo/Lucene/src/java/org/apache/lucene/store/IndexInput.java
===================================================================
--- C:/Home/jstuyts/dev/wsp/hippo/Lucene/src/java/org/apache/lucene/store/IndexInput.java	(revision 425666)
+++ C:/Home/jstuyts/dev/wsp/hippo/Lucene/src/java/org/apache/lucene/store/IndexInput.java	(working copy)
@@ -55,9 +55,21 @@
   public int readVInt() throws IOException {
     byte b = readByte();
     int i = b & 0x7F;
-    for (int shift = 7; (b & 0x80) != 0; shift += 7) {
+    if (b < 0) {
       b = readByte();
-      i |= (b & 0x7F) << shift;
+      i |= (b & 0x7F) << 7;
+      if (b < 0) {
+        b = readByte();
+        i |= (b & 0x7F) << 14;
+        if (b < 0) {
+          b = readByte();
+          i |= (b & 0x7F) << 21;
+          if (b < 0) {
+            b = readByte();
+            i |= (b & 0x7F) << 28;
+          }
+        }
+      }
     }
     return i;
   }