ZynAddSubFX/FLTK: fixed my last commit

Fixed typos in my last commit.

plugins/zynaddsubfx/fltk/src/fl_font_xft.cxx

@@ -90,9 +90,9 @@ Fl_Fontdesc* fl_fonts = built_in_table;
 
 int fl_font_ = 0;
 int fl_size_ = 0;
-#ifdef USE_XFT
+#if USE_XFT
 Fl_XFont_On_Demand fl_xfont;
-else
+#else
 FL_EXPORT XFontStruct* fl_xfont;
 #endif
 void *fl_xftfont = 0;