Fixed various memory leaks as reported by AddressSanitizer

rtengine/iccstore.cc

@@ -276,6 +276,20 @@ public:
         }
     }
 
+    ~Implementation()
+    {
+        for (auto &p : wProfiles) {
+            if (p.second) {
+                cmsCloseProfile(p.second);
+            }
+        }
+        for (auto &p : wProfilesGamma) {
+            if (p.second) {
+                cmsCloseProfile(p.second);
+            }
+        }
+    }
+
     void init(const Glib::ustring& usrICCDir, const Glib::ustring& rtICCDir, bool loadAll)
     {
         // Reads all profiles from the given profiles dir