fix some unitialized variable use (thanks valgrind)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/buffer.cc b/src/buffer.cc
index 175cffdd..d62d2e82 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -214,7 +214,7 @@ void Buffer::update_lines(const Modification& modification)
         std::vector<BufferPos> new_lines;
         // if we inserted at the end of the buffer, we may have created a new
         // line without inserting a '\n'
-        if (endpos == m_content.size() and m_content[pos-1] == '\n')
+        if (endpos == m_content.size() and pos > 0 and m_content[pos-1] == '\n')
             new_lines.push_back(pos);
 
         // every \n inserted that was not the last buffer character created a