[SPARK-16101][HOTFIX] Fix the build with Scala 2.10 by explicit typed argument

## What changes were proposed in this pull request?

I goofed in https://github.com/apache/spark/pull/16669 which introduces the break in scala 2.10.

This fixes

```bash
[error] /home/jenkins/workspace/spark-master-compile-sbt-scala-2.10/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/UnivocityParser.scala:65: polymorphic expression cannot be instantiated to expected type;
[error]  found   : [B >: org.apache.spark.sql.types.StructField](B, Int) => Int
[error]  required: org.apache.spark.sql.types.StructField => ?
[error]     fields.map(schema.indexOf).toArray
[error]                       ^
[error] one error found
[error] (sql/compile:compileIncremental) Compilation failed
```

## How was this patch tested?

Manually via

```bash
./dev/change-scala-version.sh 2.10
./build/mvn -Pyarn -Phadoop-2.4 -Dscala-2.10 -DskipTests clean package
```
```
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Spark Project Parent POM ........................... SUCCESS [  2.719 s]
[INFO] Spark Project Tags ................................. SUCCESS [  3.441 s]
[INFO] Spark Project Sketch ............................... SUCCESS [  3.411 s]
[INFO] Spark Project Networking ........................... SUCCESS [  5.088 s]
[INFO] Spark Project Shuffle Streaming Service ............ SUCCESS [  5.131 s]
[INFO] Spark Project Unsafe ............................... SUCCESS [  5.813 s]
[INFO] Spark Project Launcher ............................. SUCCESS [  6.567 s]
[INFO] Spark Project Core ................................. SUCCESS [01:39 min]
[INFO] Spark Project ML Local Library ..................... SUCCESS [  6.644 s]
[INFO] Spark Project GraphX ............................... SUCCESS [ 11.304 s]
[INFO] Spark Project Streaming ............................ SUCCESS [ 26.275 s]
[INFO] Spark Project Catalyst ............................. SUCCESS [01:04 min]
[INFO] Spark Project SQL .................................. SUCCESS [02:07 min]
[INFO] Spark Project ML Library ........................... SUCCESS [01:20 min]
[INFO] Spark Project Tools ................................ SUCCESS [  8.755 s]
[INFO] Spark Project Hive ................................. SUCCESS [ 51.141 s]
[INFO] Spark Project REPL ................................. SUCCESS [ 13.688 s]
[INFO] Spark Project YARN Shuffle Service ................. SUCCESS [  7.211 s]
[INFO] Spark Project YARN ................................. SUCCESS [ 10.908 s]
[INFO] Spark Project Assembly ............................. SUCCESS [  2.940 s]
[INFO] Spark Project External Flume Sink .................. SUCCESS [  4.386 s]
[INFO] Spark Project External Flume ....................... SUCCESS [  8.589 s]
[INFO] Spark Project External Flume Assembly .............. SUCCESS [  1.891 s]
[INFO] Spark Integration for Kafka 0.8 .................... SUCCESS [  8.458 s]
[INFO] Spark Project Examples ............................. SUCCESS [ 17.706 s]
[INFO] Spark Project External Kafka Assembly .............. SUCCESS [  3.070 s]
[INFO] Spark Integration for Kafka 0.10 ................... SUCCESS [ 11.227 s]
[INFO] Spark Integration for Kafka 0.10 Assembly .......... SUCCESS [  2.982 s]
[INFO] Kafka 0.10 Source for Structured Streaming ......... SUCCESS [  7.494 s]
[INFO] Spark Project Java 8 Tests ......................... SUCCESS [  3.748 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
```

and manual test `CSVSuite` with Scala 2.11 with my IDE.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #16684 from HyukjinKwon/hot-fix-type-ensurance.

0 files changed, 0 insertions, 0 deletions