Getting rid of more (FX_LPCWSTR) casts and fixing two bugs revealed by this.

fpdfsdk/src/javascript/Field.cpp

Index: fpdfsdk/src/javascript/Field.cpp
diff --git a/fpdfsdk/src/javascript/Field.cpp b/fpdfsdk/src/javascript/Field.cpp
index 73a4e0a9594d72b1467b8fce9bc695b189d592c8..7a9f9a0a1407fdf4d1514b9f9918c311292ae715 100644
--- a/fpdfsdk/src/javascript/Field.cpp
+++ b/fpdfsdk/src/javascript/Field.cpp
@@ -149,7 +149,7 @@ void Field::ParseFieldName(const std::wstring &strFieldNameParsed,std::wstring &
 		return;
 	}
 	std::wstring suffixal = strFieldNameParsed.substr(iStart+1);
-	iControlNo = FXSYS_wtoi((FX_LPCWSTR)suffixal.c_str());
+	iControlNo = FXSYS_wtoi(suffixal.c_str());
 	if (iControlNo == 0)
 	{
 		int iStart;
@@ -194,7 +194,7 @@ FX_BOOL Field::AttachField(Document* pDocument, const CFX_WideString& csFieldNam
 	{
 		std::wstring strFieldName;
 		int iControlNo = -1;
-		ParseFieldName((wchar_t*)(FX_LPCWSTR)swFieldNameTemp, strFieldName, iControlNo);
+		ParseFieldName(swFieldNameTemp.c_str(), strFieldName, iControlNo);
 		if (iControlNo == -1) return FALSE;
 		
 		m_FieldName = strFieldName.c_str();
@@ -1573,7 +1573,7 @@ FX_BOOL Field::exportValues(OBJ_PROP_PARAMS)
 				CPDF_FormControl* pFormControl = pFormField->GetControl(i);
 				ASSERT(pFormControl != NULL);
 
-				ExportValusArray.SetElement(i, CJS_Value(m_isolate,(FX_LPCWSTR)pFormControl->GetExportValue()));
+				ExportValusArray.SetElement(i, CJS_Value(m_isolate,pFormControl->GetExportValue().c_str()));
 			}
 		}
 		else
@@ -1582,7 +1582,7 @@ FX_BOOL Field::exportValues(OBJ_PROP_PARAMS)
 			CPDF_FormControl* pFormControl = pFormField->GetControl(m_nFormControlIndex);
 			if (!pFormControl) return FALSE;
 
-			ExportValusArray.SetElement(0, CJS_Value(m_isolate,(FX_LPCWSTR)pFormControl->GetExportValue()));
+			ExportValusArray.SetElement(0, CJS_Value(m_isolate,pFormControl->GetExportValue().c_str()));
 		}
 
 		vp << ExportValusArray;
@@ -3322,7 +3322,7 @@ FX_BOOL Field::valueAsString(OBJ_PROP_PARAMS)
 		{
 			if (pFormField->GetControl(i)->IsChecked())
 			{
-				vp << (FX_LPCWSTR)pFormField->GetControl(i)->GetExportValue();
+				vp << pFormField->GetControl(i)->GetExportValue().c_str();
 				break;
 			}
 			else
@@ -3334,7 +3334,7 @@ FX_BOOL Field::valueAsString(OBJ_PROP_PARAMS)
 		vp << L"";
 	}
 	else
-		vp << (FX_LPCWSTR)pFormField->GetValue();
+		vp << pFormField->GetValue().c_str();
 
 	return TRUE;
 }