Fix compile error.

Oops.  My version chops the "EXT" suffixes off the FBO functions and
constants.  Fix that.
diff --git a/src/libprojectM/Renderer/Renderer.cpp b/src/libprojectM/Renderer/Renderer.cpp
index 41662d5..f9b311a 100644
--- a/src/libprojectM/Renderer/Renderer.cpp
+++ b/src/libprojectM/Renderer/Renderer.cpp
@@ -294,7 +294,7 @@
   if (!renderTarget->renderToTexture)
   {
     glGetIntegerv(GL_FRAMEBUFFER_BINDING, &externalFBO);
-    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
   }
 #endif
 
@@ -316,7 +316,7 @@
   // if it exists (0 means no external FBO)
   // then rebind it just before calling the final pass: Pass2
   if (!renderTarget->renderToTexture && externalFBO != 0)
-    glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, externalFBO);
+    glBindFramebuffer (GL_FRAMEBUFFER, externalFBO);
 #endif
 
   Pass2(pipeline, pipelineContext);