Cherrypick of Dirty fix for broken cursor position after text paste

Fixes b/7110290 in jb mr1

Change-Id: I3a088f6bf889aeaddb720bd2e5359f7bf0bd98e2
diff --git a/src/com/android/mail/compose/ComposeActivity.java b/src/com/android/mail/compose/ComposeActivity.java
index 827ed7f..a76383a 100644
--- a/src/com/android/mail/compose/ComposeActivity.java
+++ b/src/com/android/mail/compose/ComposeActivity.java
@@ -540,7 +540,7 @@
         if (signatureStartPos > -1) {
             // In case the user deleted the newlines...
             mBodyView.setSelection(signatureStartPos);
-        } else if (length > 0) {
+        } else if (length >= 0) {
             // Move cursor to the end.
             mBodyView.setSelection(length);
         }