fix size type comparison

src/core/Core.cpp

@@ -228,7 +228,7 @@ bool Core::draw_trace(const string & filename, const int format){
 
 
     // Get the parser in function of the extension of the file
-    const unsigned int position_of_dot = filename.find_last_of('.');
+    const string::size_type position_of_dot = filename.find_last_of('.');
     if (position_of_dot != string::npos) {
         if(filename.substr(position_of_dot) == ".trace") {
             parser = new ParserPaje();

src/parser/Line.cpp

@@ -171,7 +171,7 @@ unsigned int Line::get_line_count() const {
 int Line::build_composite_token(const string &line, int index) {
     // line[index] corresponds to the delimiter ie " or '
     // We search the first one after this one
-    const unsigned int delimiter = line.find_first_of(line[index], index+1);
+    const string::size_type delimiter = line.find_first_of(line[index], index+1);
 
     if(delimiter == string::npos) {
         throw "overflow in buffer";