Fixes issue #703.

The function declaration fd may be null on an indirect call.

Author: redstar

dmd2/expression.c

@@ -1695,7 +1695,7 @@ Type *functionParameters(Loc loc, Scope *sc, TypeFunction *tf,
             // If not D linkage, do promotions
 #if IN_LLVM
             // LDC: don't do promotions on intrinsics
-            if (tf->linkage != LINKd && fd->llvmInternal != LLVMintrinsic)
+            if (tf->linkage != LINKd && (!fd || fd->llvmInternal != LLVMintrinsic))
 #else
             if (tf->linkage != LINKd)
 #endif