undo-unrelated code removed, 2nd attempt

CMakeLists.txt

@@ -48,7 +48,6 @@ link_directories(
     ${xinput_LIBRARY_DIRS}
     ${x11_LIBRARY_DIRS}
     ${lz4_INCLUDE_DIRS}
-
 )
 
 set(sources
@@ -79,6 +78,7 @@ target_link_libraries(${target_name}
     -lm
 )
 
+
 GETTEXT_PROCESS_PO_FILES(de ALL PO_FILES po/de.po)
 GETTEXT_PROCESS_PO_FILES(es ALL PO_FILES po/es.po)
 GETTEXT_PROCESS_PO_FILES(fa ALL PO_FILES po/fa.po)

src/config.c

@@ -316,7 +316,6 @@ gboolean parse_config (GromitData *data)
                   g_printerr ("WARNING: Unable to copy \"%s\": "
                               "not yet defined!\n", copy);
                 }
-              g_free(copy);
             }
           else
             {

src/main.c

@@ -21,16 +21,12 @@
  *
  */
 
-#include <stddef.h>
 #include <string.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include <lz4.h>
 
-#include "cairo.h"
 #include "callbacks.h"
 #include "config.h"
-#include "glibconfig.h"
 #include "input.h"
 #include "main.h"
 #include "build-config.h"
@@ -428,6 +424,7 @@ void select_tool (GromitData *data,
 }
 
 
+
 void snap_undo_state (GromitData *data)
 {
   if(data->debug)
@@ -436,6 +433,7 @@ void snap_undo_state (GromitData *data)
   undo_compress(data, data->backbuffer);
   undo_temp_buffer_to_slot(data, data->undo_head);
 
+  // Increment head position
   data->undo_head++;
   if(data->undo_head >= GROMIT_MAX_UNDO)
     data->undo_head -= GROMIT_MAX_UNDO;
@@ -448,6 +446,7 @@ void snap_undo_state (GromitData *data)
 }
 
 
+
 void copy_surface (cairo_surface_t *dst, cairo_surface_t *src)
 {
   cairo_t *cr = cairo_create(dst);
@@ -460,7 +459,7 @@ void copy_surface (cairo_surface_t *dst, cairo_surface_t *src)
 
 void undo_drawing (GromitData *data)
 {
-  if (data->undo_depth <= 0)
+  if(data->undo_depth <= 0)
     return;
   data->undo_depth--;
   data->redo_depth++;
@@ -484,6 +483,7 @@ void undo_drawing (GromitData *data)
 }
 
 
+
 void redo_drawing (GromitData *data)
 {
   if(data->redo_depth <= 0)
@@ -598,6 +598,8 @@ void main_do_event (GdkEventAny *event,
 
 
 
+
+
 void setup_main_app (GromitData *data, int argc, char ** argv)
 {
   gboolean activate;