UPBGE: Fix color space for world texture.

Color space wasn't exposed for world texture slot, now they are
the same than material texture slot.

source/blender/blenloader/intern/versioning_upbge.c

@@ -324,6 +324,14 @@ void blo_do_versions_upbge(FileData *fd, Library *lib, Main *main)
 					}
 				}
 			}
+
+			for (World *wo = main->world.first; wo; wo = wo->id.next) {
+				for (unsigned short a = 0; a < MAX_MTEX; ++a) {
+					if (wo->mtex[a]) {
+						wo->mtex[a]->colorManagement = GAME_COLOR_MANAGEMENT_SRGB;
+					}
+				}
+			}
 		}
 	}
 }

source/blender/makesrna/intern/rna_world.c

@@ -35,6 +35,7 @@
 #include "DNA_material_types.h"
 #include "DNA_texture_types.h"
 #include "DNA_world_types.h"
+#include "DNA_scene_types.h"
 
 #include "WM_types.h"
 
@@ -139,6 +140,12 @@ static void rna_def_world_mtex(BlenderRNA *brna)
 		{0, NULL, 0, NULL, NULL}
 	};
 
+	static EnumPropertyItem color_management_items[] = {
+		{GAME_COLOR_MANAGEMENT_LINEAR, "COLOR_MANAGEMENT_LINEAR", 0, "Linear", "Linear color space"},
+		{GAME_COLOR_MANAGEMENT_SRGB, "COLOR_MANAGEMENT_SRGB", 0, "sRGB", "sRGB color space"},
+		{0, NULL, 0, NULL, NULL}
+	};
+
 	srna = RNA_def_struct(brna, "WorldTextureSlot", "TextureSlot");
 	RNA_def_struct_sdna(srna, "MTex");
 	RNA_def_struct_ui_text(srna, "World Texture Slot", "Texture slot for textures in a World data-block");
@@ -164,6 +171,12 @@ static void rna_def_world_mtex(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Zenith Down", "Affect the color of the zenith below");
 	RNA_def_property_update(prop, 0, "rna_World_update");
 
+	prop = RNA_def_property(srna, "color_management", PROP_ENUM, PROP_NONE);
+	RNA_def_property_enum_sdna(prop, NULL, "colorManagement");
+	RNA_def_property_enum_items(prop, color_management_items);
+	RNA_def_property_ui_text(prop, "Color Space", "The color space of the image");
+	RNA_def_property_update(prop, 0, "rna_World_update");
+
 	prop = RNA_def_property(srna, "lod_bias", PROP_FLOAT, PROP_NONE);
 	RNA_def_property_float_sdna(prop, NULL, "lodbias");
 	RNA_def_property_ui_range(prop, -FLT_MAX, FLT_MAX, 10, 3);