Fixed android compilation issues

coreapi/android-helpers.cpp

@@ -170,17 +170,19 @@ void AndroidPlatformHelpers::releaseCpuLock(){
 }
 
 std::string AndroidPlatformHelpers::getDataPath(){
+	JNIEnv *env = ms_get_jni_env();
 	jstring jdata_path = (jstring)env->CallObjectMethod(mJavaHelper,mGetDataPathId);
 	const char *data_path = GetStringUTFChars(env, jdata_path);
-	string dataPath = data_path;
+	std::string dataPath = data_path;
 	ReleaseStringUTFChars(env, jdata_path, data_path);
 	return dataPath;
 }
 
 std::string AndroidPlatformHelpers::getConfigPath(){
+	JNIEnv *env = ms_get_jni_env();
 	jstring jconfig_path = (jstring)env->CallObjectMethod(mJavaHelper,mGetConfigPathId);
 	const char *config_path = GetStringUTFChars(env, jconfig_path);
-	string configPath = config_path;
+	std::string configPath = config_path;
 	ReleaseStringUTFChars(env, jconfig_path, config_path);
 	return configPath;
 }

src/utils/paths/paths.cpp

@@ -41,9 +41,9 @@ const string &Paths::getPath (Paths::Type type, void *context) {
 		case Data:
 			return SysPaths::getDataPath(context);
 		case Config:
+		default:
 			return SysPaths::getConfigPath(context);
 	}
-	return NULL;
 }
 
 LINPHONE_END_NAMESPACE