lcms: Fix memory leak in ReadSegmentedCurve

third_party/lcms2-2.6/0011-memory-leak-ReadSegmentedCurve.patch

+diff --git a/third_party/lcms2-2.6/src/cmstypes.c b/third_party/lcms2-2.6/src/cmstypes.c
+index 15199c7..04dd0c4 100644
+--- a/third_party/lcms2-2.6/src/cmstypes.c
++++ b/third_party/lcms2-2.6/src/cmstypes.c
+@@ -3968,7 +3968,7 @@ cmsToneCurve* ReadSegmentedCurve(struct _cms_typehandler_struct* self, cmsIOHAND
+             case cmsSigSampledCurveSeg: {
+                 cmsUInt32Number Count;
+ 
+-                if (!_cmsReadUInt32Number(io, &Count)) return NULL;
++                if (!_cmsReadUInt32Number(io, &Count)) goto Error;
+ 
+                 Segments[i].nGridPoints = Count;
+                 Segments[i].SampledPoints = (cmsFloat32Number*) _cmsCalloc(self ->ContextID, Count, sizeof(cmsFloat32Number));
+@@ -3987,7 +3987,7 @@ cmsToneCurve* ReadSegmentedCurve(struct _cms_typehandler_struct* self, cmsIOHAND
+                 _cmsTagSignature2String(String, (cmsTagSignature) ElementSig);
+                 cmsSignalError(self->ContextID, cmsERROR_UNKNOWN_EXTENSION, "Unknown curve element type '%s' found.", String);
+                 }
+-                return NULL;
++                goto Error;
+ 
+          }
+      }
+@@ -4001,7 +4001,12 @@ cmsToneCurve* ReadSegmentedCurve(struct _cms_typehandler_struct* self, cmsIOHAND
+      return Curve;
+ 
+ Error:
+-     if (Segments) _cmsFree(self ->ContextID, Segments);
++     if (Segments) {
++         for (i=0; i < nSegments; i++) {
++             if (Segments[i].SampledPoints) _cmsFree(self ->ContextID, Segments[i].SampledPoints);
++         }
++         _cmsFree(self ->ContextID, Segments);
++     }
+      return NULL;
+ }
+