[wasm][asm.js] Don't squish error location because module end not reached.

src/asmjs/asm-wasm-builder.cc

Index: src/asmjs/asm-wasm-builder.cc
diff --git a/src/asmjs/asm-wasm-builder.cc b/src/asmjs/asm-wasm-builder.cc
index 917de8b32349df2f7b64d582630bf800b96ac4c2..bf89ed13872bef8fb6ffa61416a24214ecc9e46f 100644
--- a/src/asmjs/asm-wasm-builder.cc
+++ b/src/asmjs/asm-wasm-builder.cc
@@ -123,7 +123,7 @@ class AsmWasmBuilderImpl final : public AstVisitor<AsmWasmBuilderImpl> {
     if (HasStackOverflow()) {
       return false;
     }
-    if (!typer_finished_) {
+    if (!typer_finished_ && !typer_failed_) {
       typer_->FailWithMessage("Module missing export section.");
       typer_failed_ = true;
     }