Fix return code

src/main.cpp

@@ -172,7 +172,7 @@ int main(int argc, char** argv){
 	defaultMode.getValue(fileInputRaw, "inputraw");
 	defaultMode.getValue(fileInputFull, "inputfull");
 	
-	return computeAttributeOffset(fileInputRaw, fileInputFull);
+	return computeAttributeOffset(fileInputRaw, fileInputFull) - 1;
 }