Add PR to this FIXME, looks like I didn't commit this change after all.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83457 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/MallocHelper.cpp

@@ -40,7 +40,8 @@ static bool isMallocCall(const CallInst *CI) {
     return false;
 
   // Check malloc prototype.
-  // FIXME: this will be obsolete when nobuiltin attribute will exist.
+  // FIXME: workaround for PR5130, this will be obsolete when a nobuiltin 
+  // attribute will exist.
   const FunctionType *FTy = MallocFunc->getFunctionType();
   if (FTy->getNumParams() != 1)
     return false;