Add a guard against a wrong use of flags

Fixes #471 Thanks for reporting!

Author: mm2

Projects/VC2022/fuzzers/fuzzers.vcxproj

@@ -155,12 +155,12 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <ProjectReference Include="..\lcms2_static\lcms2_static.vcxproj">
-      <Project>{74e045a1-5ea1-4c83-85e9-9e6632db8cd1}</Project>
-    </ProjectReference>
+    <ClCompile Include="..\..\..\fuzzers\fuzzers.c" />
   </ItemGroup>
   <ItemGroup>
-    <ClCompile Include="..\..\..\fuzzers\fuzzers.c" />
+    <ProjectReference Include="..\lcms2_static\lcms2_static.vcxproj">
+      <Project>{71dede59-3f1e-486b-a899-4283000f76b5}</Project>
+    </ProjectReference>
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

fuzzers/fuzzers.exp

@@ -1351,6 +1351,13 @@ cmsBool WriteOutputLUT(cmsIOHANDLER* m, cmsHPROFILE hProfile, cmsUInt32Number In
 
     first = cmsPipelineGetPtrToFirstStage(DeviceLink);
     if (first != NULL) {
+        if (first->Type != cmsSigCLutElemType) {
+            cmsPipelineFree(DeviceLink);
+            cmsDeleteTransform(xform);
+            cmsSignalError(m->ContextID, cmsERROR_CORRUPTION_DETECTED, "Cannot create CLUT, revise your flags!");
+            return FALSE;
+        }
+
         WriteCLUT(m, first, "<", ">\n", "", "", lFixWhite, ColorSpace);
     }