Subject: Fix decision if sample rate ratio is an integer value or not
 If the sample rate of the input file is sufficiently close to an
 integer multiple of the output sample rate, the value of the intratio
 variable is calculated incorrectly. This leads to further values
 being miscalculated up to the joff variable which is used as an index
 to dereference the esv->blackfilt array. This leads top an overflow
 and causes a segmentation fault.
Author: Fabian Greffrath <fabian+debian@greffrath.com>
Bug-Debian: https://bugs.debian.org/778529

--- a/libmp3lame/util.c
+++ b/libmp3lame/util.c
@@ -26,6 +26,7 @@
 # include <config.h>
 #endif
 
+#include <float.h>
 #include "lame.h"
 #include "machine.h"
 #include "encoder.h"
@@ -544,7 +545,7 @@ fill_buffer_resample(lame_internal_flags
     if (bpc > BPC)
         bpc = BPC;
 
-    intratio = (fabs(resample_ratio - floor(.5 + resample_ratio)) < .0001);
+    intratio = (fabs(resample_ratio - floor(.5 + resample_ratio)) < FLT_EPSILON);
     fcn = 1.00 / resample_ratio;
     if (fcn > 1.00)
         fcn = 1.00;