Fix member variable masking warning in standalone MSVS build

The patch for initializing output variables introduced a warning that
broke MSVS 2015 standalone build. The "shaderType" variable passed to
TCompiler::initializeOutputVariables was unnecessary and had the same
name as a member variable of TCompiler that stores the shader type.

TEST=MSVS 2015 build

Change-Id: I9e01f5eae77a88babde21d4864a02c8731a220de
Reviewed-on: https://chromium-review.googlesource.com/362550
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
diff --git a/src/compiler/translator/Compiler.h b/src/compiler/translator/Compiler.h
index 337bfc9..4657daa 100644
--- a/src/compiler/translator/Compiler.h
+++ b/src/compiler/translator/Compiler.h
@@ -132,7 +132,7 @@
     bool enforcePackingRestrictions();
     // Insert statements to initialize output variables in the beginning of main().
     // This is to avoid undefined behaviors.
-    void initializeOutputVariables(TIntermNode *root, sh::GLenum shaderType);
+    void initializeOutputVariables(TIntermNode *root);
     // Insert gl_Position = vec4(0,0,0,0) to the beginning of main().
     // It is to work around a Linux driver bug where missing this causes compile failure
     // while spec says it is allowed.