crash guard when there's no config file (darwin only?)

src/CFGFileParser.cpp

@@ -10,9 +10,13 @@ CFGFileParser::CFGFileParser(const char* filename){
     cfg_file = fopen(filename, "rb"); // On NT, opening in text mode translates \n into \r\n
     stat(filename, cfg_fileinfo);
     buffer = static_cast<char*>(tlsf_malloc(cfg_fileinfo->st_size & INT_MAX));
-    bytesRead = fread(buffer, sizeof(char) & INT_MAX, cfg_fileinfo->st_size & INT_MAX, cfg_file);
-    if (!bytesRead) {
-        std::cout << "no config" << std::endl;
+    if (cfg_file) {
+        bytesRead = fread(buffer, sizeof(char) & INT_MAX, cfg_fileinfo->st_size & INT_MAX, cfg_file);
+        if (!bytesRead) {
+            std::cout << "can't read config" << std::endl;
+        }
+    } else {
+        std::cout << "can't open config" << std::endl;
     }
     fclose(cfg_file);
 }
@@ -101,4 +105,4 @@ bool CFGFileParser::ParseText() {
 // object supplied by the user.
 void CFGFileParser::WriteConfig(BrowserConfiguration &config){
     config.Settings = cfg->Settings;
-}
\ No newline at end of file
+}