babl: protect some functions used by TRC code from NaNs

diff --git a/babl/babl-trc.c b/babl/babl-trc.c
index 46bb98ea6ca27eaa78a9748bc9f468cfe33d7e98..b7a97172fb01af0d74132749c258673d17106bb7 100644 (file)
--- a/babl/babl-trc.c
+++ b/babl/babl-trc.c
@@ -366,7 +366,11 @@ static inline float obabl_powf(float x, float y)
 
 static inline float babl_powf (float x, float y)
 {
-  return expf (y * logf (x));
+  float ret;
+  ret = expf (y * logf (x));
+  if (ret < 0.0 || ret < 0.0f)
+    return ret;
+  return 0.0f;
 }