Make sure strings like 2.0 aren't misdetected as 0.0 or 1.0.

http://bugs.gentoo.org/100374

--- src/pengine/glew.c
+++ src/pengine/glew.c
@@ -5737,13 +5737,13 @@
   s = glGetString(GL_VERSION);
   if (!s) return GLEW_ERROR_NO_GL_VERSION;
   i = _glewStrCLen(s, '.')+1;
-  if (s+i-1 == NULL || s+i == NULL || s[i] < '1')
+  if (s+i-1 == NULL || s+i == NULL || (s[0] < '2' && s[i] < '1'))
   {
     return GLEW_ERROR_GL_VERSION_10_ONLY;
   }
   else
   {
-    if (s[i] >= '5')
+    if (s[0] >= '2' || s[i] >= '5')
     {
       GLEW_VERSION_1_1 = GL_TRUE;
       GLEW_VERSION_1_2 = GL_TRUE;