Replaced incorrect use of abs() with floating point argument by fabs().

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10707 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 2 insertions, 1 deletions

diff --git a/src/fl_font_mac.cxx b/src/fl_font_mac.cxx
index 49d2fa11a..895eef826 100644
--- a/src/fl_font_mac.cxx
+++ b/src/fl_font_mac.cxx
@@ -17,6 +17,7 @@
 //
 
 #include <config.h>
+#include <math.h>
 
 /* from fl_utf.c */
 extern unsigned fl_utf8toUtf16(const char* src, unsigned srclen, unsigned short* dst, unsigned dstlen);
@@ -48,7 +49,7 @@ if (fl_mac_os_version >= Fl_X::CoreText_threshold) {
   double w;
   CTFontGetAdvancesForGlyphs(fontref, kCTFontHorizontalOrientation, glyph, advances, 2);
   w = advances[0].width;
-  if ( abs(advances[0].width - advances[1].width) < 1E-2 ) {//this is a fixed-width font
+  if ( fabs(advances[0].width - advances[1].width) < 1E-2 ) {//this is a fixed-width font
     // slightly rescale fixed-width fonts so the character width has an integral value
     CFRelease(fontref);
     CGFloat fsize = size / ( w/floor(w + 0.5) );