fixed two GCC warnings

f5cda4fc · Christian Schulte zu Berge · 497f1a62 · f5cda4fc
Commit f5cda4fc authored Oct 07, 2014 by Christian Schulte zu Berge
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ext/tgt/shadermanager.cpp ext/tgt/shadermanager.cpp +1 -1

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--- a/ext/tgt/shadermanager.cpp
+++ b/ext/tgt/shadermanager.cpp
@@ -1324,7 +1324,7 @@ void Shader::setNormalizedAttribute(GLint index, const Vector4<GLuint>& v) {

 bool Shader::selectSubroutine(ShaderObject::ShaderType type, const std::string& subroutineName) {
    GLuint index = glGetSubroutineIndex(id_, type, subroutineName.c_str());
-    if (index == -1) {
+    if (index == GL_INVALID_INDEX) {
        LWARNING("Failed to locate subroutine Location: " << subroutineName);
        return false;
    }