Fix some egl robustness tests

Because the values of color were initially undefined an optimised
compiler can simply set all components of the vector to the value
being assigned to color[u_index] and eventually eliminate color and
u_index completely.

To avoid this we initialise color.

Affects:
dEQP-EGL.functional.robustness.reset_context.shaders*

Components: OpenGL
VK-GL-CTS issue: 2349

Change-Id: I6eb929eec07b039afb247427af91aba65dbade9b
(cherry picked from commit 4392facc87c2da80b5065f8663b9303fb1113e16)

diff --git a/modules/egl/teglRobustnessTests.cpp b/modules/egl/teglRobustnessTests.cpp
index 452777f..0953e3a 100644 (file)
--- a/modules/egl/teglRobustnessTests.cpp
+++ b/modules/egl/teglRobustnessTests.cpp
@@ -1108,7 +1108,7 @@ std::string ShadersOOB::genVertexShader (const std::string& shaderDecl, const st
                                                                <<      shaderDecl << "\n"
                                                                <<      "void main (void)\n"
                                                                <<      "{\n"
-                                                               <<      "       highp vec4 color;\n"
+                                                               <<      "       highp vec4 color = vec4(0.0f);\n"
                                                                <<      shaderBody << "\n"
                                                                <<      "       v_color = color;\n"
                                                                <<      "       gl_Position = a_position;\n"