skia: Initialize value passed to GetShaderiv in GLBench

bench/GLBench.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GLBench.h"
 
 #if SK_SUPPORT_GPU
@@ skipping 52 matching lines @@
     // Create the shader object
     GR_GL_CALL_RET(gl, shader, CreateShader(type));
 
     // Load the shader source
     GR_GL_CALL(gl, ShaderSource(shader, 1, &shaderSrc, nullptr));
 
     // Compile the shader
     GR_GL_CALL(gl, CompileShader(shader));
 
     // Check for compile time errors
-    GrGLint success;
+    GrGLint success = GR_GL_INIT_ZERO;
     GrGLchar infoLog[512];
     GR_GL_CALL(gl, GetShaderiv(shader, GR_GL_COMPILE_STATUS, &success));
     if (!success) {
         GR_GL_CALL(gl, GetShaderInfoLog(shader, 512, nullptr, infoLog));
         SkDebugf("ERROR::SHADER::COMPLIATION_FAILED: %s\n", infoLog);
     }
 
     return shader;
 }
 
 GrGLuint GLBench::CreateProgram(const GrGLInterface* gl, const char* vshader, const char* fshader) {
 
     GrGLuint vertexShader = CompileShader(gl, vshader, GR_GL_VERTEX_SHADER);
     GrGLuint fragmentShader = CompileShader(gl, fshader, GR_GL_FRAGMENT_SHADER);
 
     GrGLuint shaderProgram;
     GR_GL_CALL_RET(gl, shaderProgram, CreateProgram());
     GR_GL_CALL(gl, AttachShader(shaderProgram, vertexShader));
     GR_GL_CALL(gl, AttachShader(shaderProgram, fragmentShader));
     GR_GL_CALL(gl, LinkProgram(shaderProgram));
 
     // Check for linking errors
-    GrGLint success;
+    GrGLint success = GR_GL_INIT_ZERO;
     GrGLchar infoLog[512];
     GR_GL_CALL(gl, GetProgramiv(shaderProgram, GR_GL_LINK_STATUS, &success));
     if (!success) {
         GR_GL_CALL(gl, GetProgramInfoLog(shaderProgram, 512, nullptr, infoLog));
         SkDebugf("Linker Error: %s\n", infoLog);
     }
     GR_GL_CALL(gl, DeleteShader(vertexShader));
     GR_GL_CALL(gl, DeleteShader(fragmentShader));
 
     return shaderProgram;
@@ skipping 56 matching lines @@
     bm.setPixels(readback.get());
 
     if (!SkImageEncoder::EncodeFile(filename, bm, SkImageEncoder::kPNG_Type, 100)) {
         SkDebugf("------ failed to encode %s\n", filename);
         remove(filename);   // remove any partial file
         return;
     }
 }
 
 #endif