moved SAFE_DELETE to lib.h

dyn_array supports "wrapping" other types of memory (stopgap measure)
texture codecs now load via DynArray (intermediate step to all mem stuff
going through res/mem.cpp)
simplified tex codecs by doing as many checks as possible in
tex_load_mem ("template method"-esque)

This was SVN commit r2690.

source/graphics/MaterialManager.cpp

@@ -3,9 +3,6 @@
 #include "XML/Xeromyces.h"
 #include "MaterialManager.h"
 
-#define SAFE_DELETE(x) \
-    if((x)) { delete (x); (x) = NULL; }
-
 static float ClampFloat(float value, float min, float max)
 {
     if(value < min)