Misc: changed embedded ProggyClean encoding to save a bit of binary space (~12kb to 9.5kb). (#8161)

Encoding as char to ensure compatibility with big endian (#81)

Author: ocornut

docs/CHANGELOG.txt

@@ -53,6 +53,7 @@ Other changes:
 
 - Error Handling: fixed cases where recoverable error handling would crash when 
   processing errors outside of the NewFrame()..EndFrame() scope. (#1651)
+- Misc: changed embedded ProggyClean encoding to save a bit of binary space (~12kb to 9.5kb).
 - Misc: added IMGUI_DISABLE_DEFAULT_FONT to strip embedded font from binary. (#8161)
   [@demonese]
 - Demo: example tree used by Property Editor & Selection demos properly freed

imconfig.h

@@ -48,7 +48,7 @@
 //#define IMGUI_DISABLE_FILE_FUNCTIONS                      // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite and ImFileHandle at all (replace them with dummies)
 //#define IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS              // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite and ImFileHandle so you can implement them yourself if you don't want to link with fopen/fclose/fread/fwrite. This will also disable the LogToTTY() function.
 //#define IMGUI_DISABLE_DEFAULT_ALLOCATORS                  // Don't implement default allocators calling malloc()/free() to avoid linking with them. You will need to call ImGui::SetAllocatorFunctions().
-//#define IMGUI_DISABLE_DEFAULT_FONT                        // Disable default embedded font (ProggyClean.ttf), remove ~14 KB from output binary. AddFontDefault() will assert.
+//#define IMGUI_DISABLE_DEFAULT_FONT                        // Disable default embedded font (ProggyClean.ttf), remove ~9.5 KB from output binary. AddFontDefault() will assert.
 //#define IMGUI_DISABLE_SSE                                 // Disable use of SSE intrinsics even if available
 
 //---- Enable Test Engine / Automation features.