Fix [#20756] Texture painting on 3D tends to forget textures in the new texture menu.

Part of this fix (loading files with brushes/textures) will only apply for new files saved after this commit

source/blender/blenkernel/BKE_blender.h

@@ -43,7 +43,7 @@ struct bContext;
 struct ReportList;
 
 #define BLENDER_VERSION			250
-#define BLENDER_SUBVERSION		11
+#define BLENDER_SUBVERSION		12
 
 #define BLENDER_MINVERSION		250
 #define BLENDER_MINSUBVERSION	0

source/blender/blenkernel/intern/brush.c

@@ -89,6 +89,8 @@ Brush *add_brush(const char *name)
 	brush->flag |= BRUSH_SPACE;
 
 	brush_curve_preset(brush, CURVE_PRESET_SMOOTH);
+	
+	default_mtex(&brush->mtex);
 
 	/* enable fake user by default */
 	brush->id.flag |= LIB_FAKEUSER;

source/blender/blenloader/intern/readfile.c

@@ -10373,9 +10373,8 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 		}
 	}
 
-	/* put 2.50 compatibility code here until next subversion bump */
-
-	if (1) {
+	if (main->versionfile < 250 || (main->versionfile == 250 && main->subversionfile < 12))
+	{
 		Scene *sce;
 		Object *ob;
 		Brush *brush;
@@ -10475,6 +10474,12 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 		}
 		
 	}
+	
+	
+	/* put 2.50 compatibility code here until next subversion bump */
+	if (1) {
+		;
+	}
 
 	/* WATCH IT!!!: pointers from libdata have not been converted yet here! */
 	/* WATCH IT 2!: Userdef struct init has to be in src/usiblender.c! */

source/blender/blenloader/intern/writefile.c

@@ -2324,6 +2324,8 @@ static void write_brushes(WriteData *wd, ListBase *idbase)
 			writestruct(wd, ID_BR, "Brush", 1, brush);
 			if (brush->id.properties) IDP_WriteProperty(brush->id.properties, wd);
 			
+			writestruct(wd, DATA, "MTex", 1, &brush->mtex);
+			
 			if(brush->curve)
 				write_curvemapping(wd, brush->curve);
 		}