add check for divide by zero

Check for corrupted profiles

1 files changed, 6 insertions, 1 deletions

diff --git a/src/cmssamp.c b/src/cmssamp.c
index 463de69..f5957d1 100644
--- a/src/cmssamp.c
+++ b/src/cmssamp.c
@@ -323,6 +323,7 @@ cmsFloat64Number RootOfLeastSquaresFitQuadraticCurve(int n, cmsFloat64Number x[]
 
     if (fabs(a) < 1.0E-10) {
     
+        if (fabs(b) < 1.0E-10) return 0;
         return cmsmin(0, cmsmax(50, -c/b ));
     }
     else {
@@ -333,7 +334,11 @@ cmsFloat64Number RootOfLeastSquaresFitQuadraticCurve(int n, cmsFloat64Number x[]
          }
          else {
 
-             double rt = (-b + sqrt(d)) / (2.0 * a);
+             double rt;
+             
+             if (fabs(a) < 1.0E-10) return 0;
+
+             rt = (-b + sqrt(d)) / (2.0 * a);
 
              return cmsmax(0, cmsmin(50, rt));
          }