Disables annoying messageboxes when working with TIFF files, Issue 2094

rtgui/main.cc

@@ -27,6 +27,7 @@
 #include <gtkmm.h>
 #include <giomm.h>
 #include <iostream>
+#include <tiffio.h>
 #include "rtwindow.h"
 #include <cstring>
 #include <cstdlib>
@@ -148,6 +149,9 @@ int main(int argc, char **argv)
 		   return ret;
    }
 
+   if( !options.rtSettings.verbose )
+       TIFFSetWarningHandler(NULL);  // avoid annoying message boxes
+
 #ifndef WIN32
    // Move the old path to the new one if the new does not exist
    if (safe_file_test(Glib::build_filename(options.rtdir,"cache"), Glib::FILE_TEST_IS_DIR) && !safe_file_test(options.cacheBaseDir, Glib::FILE_TEST_IS_DIR))