LibCore: Do not try to null-terminate a ByteBuffer in read_line()

That's just silly :)
Also fix that one use of read_line() which assumes it will
null-terminated in mount.cpp (this would've blown up if the IODevice was
at EOF and had a line with the same size as max_size).

1 files changed, 1 insertions, 2 deletions

diff --git a/Libraries/LibCore/IODevice.cpp b/Libraries/LibCore/IODevice.cpp
index 63079c5721..81d759afd0 100644
--- a/Libraries/LibCore/IODevice.cpp
+++ b/Libraries/LibCore/IODevice.cpp
@@ -200,8 +200,7 @@ ByteBuffer IODevice::read_line(size_t max_size)
             Vector<u8> new_buffered_data;
             new_buffered_data.append(m_buffered_data.data() + line_index, m_buffered_data.size() - line_index);
             m_buffered_data = move(new_buffered_data);
-            line[line_index] = '\0';
-            line.trim(line_index + 1);
+            line.trim(line_index);
             return line;
         }
     }