Fix off-by-one.

Bug: 7330567
Change-Id: I8653435c77daefa24991595f68b9f23dd930f14a
diff --git a/core/jni/android_os_UEventObserver.cpp b/core/jni/android_os_UEventObserver.cpp
index 7033ff3..3f7c7d2 100644
--- a/core/jni/android_os_UEventObserver.cpp
+++ b/core/jni/android_os_UEventObserver.cpp
@@ -49,7 +49,7 @@
 
         // Consider all zero-delimited fields of the buffer.
         const char* field = buffer;
-        const char* end = buffer + length;
+        const char* end = buffer + length + 1;
         do {
             if (strstr(field, match.string())) {
                 ALOGV("Matched uevent message with pattern: %s", match.string());