Second attempt at fixing skewed textures.

Fixes issue #346, which reported that the skewed textures occured if the
game was toggled between fullscreen and windowed, or if the resolution
changed. The GL_PACK_ALIGNMENT/GL_UNPACK_ALIGNMENT values needed to be
set before ContextInitializer::executeInitFuncs(), or else affected
textures would be skewed upon context re-creation. The moves the calls
to glPixelStorei setting the alignment into the
OpenGLGState::initGLState() function.

src/ogl/OpenGLGState.cxx

@@ -1362,8 +1362,6 @@ void OpenGLGState::initContext()
     glLoadIdentity();
     glEnable(GL_SCISSOR_TEST);
     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
-    glPixelStorei(GL_UNPACK_ALIGNMENT,1);
-    glPixelStorei(GL_PACK_ALIGNMENT,1);
 }
 
 
@@ -1388,6 +1386,9 @@ void OpenGLGState::initGLState()
     glEnableClientState(GL_VERTEX_ARRAY);
     glEnableClientState(GL_NORMAL_ARRAY);
     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT,1);
+    glPixelStorei(GL_PACK_ALIGNMENT,1);
 }
 
 // utility to check if an OpenGL extension is supported on this system