Bugfix #7804 : Opened file is not registered correctly when started from command line

- treat file passed as parameter the same as if loaded from UI if Blender isn't running in background mode.
- only set relative base as valid if file loaded successfully.

source/blender/src/usiblender.c

@@ -458,7 +458,7 @@ void BIF_read_file(char *name)
 
 		if(retval==2) init_userdef_file();	// in case a userdef is read from regular .blend
 		
-		G.relbase_valid = 1;
+		if (retval!=0) G.relbase_valid = 1;
 
 		undo_editmode_clear();
 		BKE_reset_undo();

source/creator/creator.c

@@ -686,13 +686,19 @@ int main(int argc, char **argv)
 				break;
 			}
 		}
-		else {
-			BKE_read_file(argv[a], NULL);
-			sound_initialize_sounds();
-			
-			/* happens for the UI on file reading too */
-			BKE_reset_undo();
-			BKE_write_undo("original");	/* save current state */
+		else {			
+			if (G.background) {
+				BKE_read_file(argv[a], NULL);
+				sound_initialize_sounds();
+
+				/* happens for the UI on file reading too */
+				BKE_reset_undo();
+				BKE_write_undo("original");	/* save current state */
+			} else {
+				/* we are not running in background mode here, but start blender in UI mode with 
+				   a file - this should do everything a 'load file' does */
+				BIF_read_file(argv[a]);
+			}			
 		}
 	}