Initialize fragmentPrecisionHigh in constructor.

This was the only field not initialized by the constructor, which
looks like an oversight.

Change-Id: If61424d574c663113a4c6d31e94b6ec13b412884
Reviewed-on: https://chromium-review.googlesource.com/257360
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/compiler/translator/ParseContext.h b/src/compiler/translator/ParseContext.h
index 786f15d..20f3b36 100644
--- a/src/compiler/translator/ParseContext.h
+++ b/src/compiler/translator/ParseContext.h
@@ -38,6 +38,7 @@
             currentFunctionType(NULL),
             mFunctionReturnsValue(false),
             checksPrecisionErrors(checksPrecErrors),
+            fragmentPrecisionHigh(false),
             defaultMatrixPacking(EmpColumnMajor),
             defaultBlockStorage(EbsShared),
             diagnostics(is),