coa: sanitize debuff icon path before SetTexture

Ascension has been shipping auras whose UnitAura()-returned icon path
is nil or unresolvable on the local client. Decursive's LiveList fed
it straight into Texture:SetTexture(), and on the 3.3.5 engine that
crashes the renderer downstream — #132 ACCESS_VIOLATION near
Ascension.exe text + null+offset (texture-loader struct left
half-initialized). Confirmed across multiple recent DLL hashes
(0baf62b, 6a3088c, 7bba9c8, 502ca3c), recurring fault @ 0x00749EEB.

Fix: when Debuff.Texture isn't a non-empty string, fall back to
INV_Misc_QuestionMark and log the offender once (via AddDebugText so
it lands in Logs/Trace.txt) for future identification of the bad aura.

Bumped toc to Asc-1.1.3-coa.

Decursive/Dcr_LiveList.lua

@@ -272,8 +272,23 @@ function LiveList.prototype:SetDebuff(UnitID, Debuff, IsCharmed) -- {{{
 
     -- Set the graphical elements to the right values
     -- Icon
+    -- CoA: Ascension sometimes ships auras whose icon path is missing/invalid on
+    -- the local client; passing those into SetTexture has crashed the engine
+    -- (#132 ACCESS_VIOLATION, fault inside Ascension.exe texture loader).
+    -- Fall back to the question-mark icon and record the offender once so it
+    -- shows up in Logs/Trace.txt.
     if self.PrevDebuffTexture ~= Debuff.Texture then
-        self.IconTexture:SetTexture(Debuff.Texture);
+        local tex = Debuff.Texture;
+        if type(tex) ~= "string" or tex == "" then
+            if not D.coa_LoggedBadTextures then D.coa_LoggedBadTextures = {}; end
+            local key = tostring(tex);
+            if not D.coa_LoggedBadTextures[key] then
+                D.coa_LoggedBadTextures[key] = true;
+                D:AddDebugText("CoA: bad debuff icon, falling back. Name=", Debuff.Name, "Type=", Debuff.TypeName, "raw=", tex);
+            end
+            tex = "Interface\\Icons\\INV_Misc_QuestionMark";
+        end
+        self.IconTexture:SetTexture(tex);
         self.PrevDebuffTexture =  Debuff.Texture;
     end