fix small bug in EGL error management

make sure to clear our EGL implementation's error when returning
an error from an underlying implementation

Change-Id: Ibce4726cef1f900e4c7f16002345d7a07f8cdf41
diff --git a/opengl/libs/EGL/egl.cpp b/opengl/libs/EGL/egl.cpp
index df21358..105ebb4 100644
--- a/opengl/libs/EGL/egl.cpp
+++ b/opengl/libs/EGL/egl.cpp
@@ -1344,16 +1344,18 @@
 EGLint eglGetError(void)
 {
     EGLint result = EGL_SUCCESS;
+    EGLint err;
     for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-        EGLint err = EGL_SUCCESS;
+        err = EGL_SUCCESS;
         egl_connection_t* const cnx = &gEGLImpl[i];
         if (cnx->dso)
             err = cnx->egl.eglGetError();
         if (err!=EGL_SUCCESS && result==EGL_SUCCESS)
             result = err;
     }
+    err = getError();
     if (result == EGL_SUCCESS)
-        result = getError();
+        result = err;
     return result;
 }