FileReader: fix num_lines()

src/lib/include/jes/FileReader.h

@@ -22,7 +22,17 @@ namespace jes
         FileReader();
         ~FileReader();
         bool load(const char * fname);
-        unsigned int num_lines() { return m_num_lines; }
+        unsigned int num_lines()
+        {
+            if (m_lines.is_null())
+            {
+                return 0u;
+            }
+            else
+            {
+                return m_lines->size();
+            }
+        }
         TextRef get_line(unsigned int line_no);
         int get_line_endings() { return m_line_endings; }
     protected:
@@ -31,7 +41,6 @@ namespace jes
         typedef Ref<LineIndexPairVector> LineIndexPairVectorRef;
         void load_buf(size_t size);
         int m_fd;
-        unsigned int m_num_lines;
         uint8_t * m_buf;
         int m_line_endings;
         LineIndexPairVectorRef m_lines;

src/lib/src/FileReader.cc

@@ -11,7 +11,6 @@ namespace jes
     FileReader::FileReader()
     {
         m_fd = 0;
-        m_num_lines = 0u;
         m_buf = NULL;
         m_line_endings = LINE_ENDING_COUNT;
         m_lines = NULL;