Fix off-by-one error in the packet decompression routine
that would not pass through empty ("unsupported packet") replies
correctly.

llvm-svn: 242119
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
index 1af3947..ce0e806 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
@@ -564,7 +564,7 @@
         return true;
 
     size_t pkt_size = m_bytes.size();
-    if (pkt_size < 6)
+    if (pkt_size < 5)
         return true;
     if (m_bytes[0] != '$' && m_bytes[0] != '%')
         return true;