some effc++ fixes

texture.hh

@@ -24,7 +24,7 @@ static unsigned ilog2(unsigned in)
 
 class Framebuffer {
 public:
-  Framebuffer() {
+  Framebuffer() : _fbID(0) {
     glGenFramebuffers(1, &_fbID);
   }
 
@@ -51,7 +51,7 @@ private:
 
 class TextureCubeMap {
 public:
-  TextureCubeMap(unsigned size) {
+  TextureCubeMap(unsigned size) : _texID(0) {
     glGenTextures(1, &_texID);
     glBindTexture(GL_TEXTURE_CUBE_MAP, _texID);
     
@@ -106,11 +106,11 @@ private:
 
 class Texture2D {
 public:
-  Texture2D(unsigned width, unsigned height) {
+  Texture2D(unsigned width, unsigned height) : _texID(0) {
     _glCreate(width, height);
   }
 
-  Texture2D(std::string const& file) {
+  Texture2D(std::string const& file) : _texID(0) {
     SDL_Surface *surf = IMG_Load(file.c_str());
     if (!surf)
       throw SDLException();