Fixed internal texture id for first texture ( should be 1 not zero )

Otherwise texturemap of id 0 would be something different then no texture!

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@5819 383ad7c9-94d9-4d36-a494-682f7c89f535

TextureData.cc

@@ -48,7 +48,7 @@ Texture::Texture() :
 }
 
 TextureData::TextureData() :
-  nextInternalID_(0)
+  nextInternalID_(1)
 {
   // map 0 to no texture
   textureMap_[0]     = 0;