Gfx-3d: fix GetProcAddress in egl extention

This patch can fix issue when Proc address return NULL.
Glbench10, egl-ext and conformance test need this patch to run pass.

Change-Id: I275c7cb6f77cb334c3ee7fa23cd696bba1c5a458
Author: Liuhui Lu <liuhui.lu@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 52622
diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index 4e44941..065faf2 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -760,8 +760,8 @@
 
             egl_connection_t* const cnx = &gEGLImpl;
             if (cnx->dso && cnx->egl.eglGetProcAddress) {
-                found = true;
                 // Extensions are independent of the bound context
+                addr =
                 cnx->hooks[egl_connection_t::GLESv1_INDEX]->ext.extensions[slot] =
                 cnx->hooks[egl_connection_t::GLESv2_INDEX]->ext.extensions[slot] =
 #if EGL_TRACE
@@ -769,10 +769,13 @@
                 gHooksTrace.ext.extensions[slot] =
 #endif
                         cnx->egl.eglGetProcAddress(procname);
+                if (addr) found = true;
             }
 
             if (found) {
+#if USE_FAST_TLS_KEY
                 addr = gExtensionForwarders[slot];
+#endif
                 sGLExtentionMap.add(name, addr);
                 sGLExtentionSlot++;
             }