[GLESv3] Fix build

Change-Id: I1255b2505eec7ce032992b99c20df4a1dca4394f
diff --git a/shared/OpenglCodecCommon/GLSharedGroup.cpp b/shared/OpenglCodecCommon/GLSharedGroup.cpp
index 58dc89a..beaf1e2 100755
--- a/shared/OpenglCodecCommon/GLSharedGroup.cpp
+++ b/shared/OpenglCodecCommon/GLSharedGroup.cpp
@@ -511,7 +511,7 @@
     ProgramData* pData = m_programs.valueFor(program);
     if (pData) return pData->getNextSamplerUniform(index, val, target);
     if (m_shaderProgramIdMap.find(program) == m_shaderProgramIdMap.end()) return -1;
-    ShaderProgramData* spData = m_shaderPrograms.valueFor(m_shaderProgramIdMap.at(program));
+    ShaderProgramData* spData = m_shaderPrograms.valueFor(m_shaderProgramIdMap.find(program)->second);
     if (spData) return spData->programData->getNextSamplerUniform(index, val, target);
     return -1;
 }