BlenderDNA.h:

* Fix rethrow that would crash the program.
* QUESTION: am I throwing the right exception here.

COBLoader:
* catch exception by const ref
* fix equality checks using strncmp taht weren't actually checking equality

FBXMaterial: Catch exception by const ref (+ Debug log that it's done so)

FBXConverter: Rename local variables to avoid shadowing parameter

ImageExtractor: Remove duplicated/unreachable code

FBXConverter: Another shadowed variable fix

MD5Loader: 2 shadowed variables

IRRLoader: shadowed parameter

StepFileReader.cpp: Shadowed parameter

IRRLoader: remove empty else statement

STLExporter: Throw error instead of silently ignoring unimplemented option

Misc empty blocks removed or debug logging added

code/AssxmlExporter.cpp

@@ -555,8 +555,6 @@ void WriteDump(const aiScene* scene, IOStream* io, bool shortened) {
                             mesh->mNormals[n].z);
                     }
                 }
-                else {
-                }
                 ioprintf(io,"\t\t</Normals>\n");
             }