Fixed handling of missing fonts in Xft (STR #2355)

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7855 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

CHANGES

@@ -1,5 +1,6 @@
 CHANGES IN FLTK 1.3.0
 
+	- Fixed handling of missing fonts in Xft (STR #2355)
 	- Added alternative Xft font names (STR #2215)
 	- Update lib png access (STR #2442)
 	- Fixed OpenGL hide/show issue in OS X (STR #2260)

src/fl_font_xft.cxx

@@ -289,6 +289,20 @@ static XftFont* fontopen(const char* name, bool core, int angle) {
     free(picked_name);
 #endif
 
+    if (!match_pat) {
+      // last chance, just open any font in the right size
+      the_font = XftFontOpen (fl_display, fl_screen,
+                        XFT_FAMILY, XftTypeString, "sans",
+                        XFT_SIZE, XftTypeDouble, (double)fl_size_,
+                        NULL);
+      XftPatternDestroy(fnt_pat);
+      if (!the_font) {
+        Fl::error("Unable to find fonts. Check your FontConfig configuration.\n");
+        exit(1);
+      }
+      return the_font;
+    }
+
     // open the matched font
     the_font = XftFontOpenPattern(fl_display, match_pat);