bugfix, txt_to_buf would crash on an empty text file.

Also checked all other uses of text->lines.first to make sure the assumption isn't made elsewhere.
Added 2 more checks for text->lines.first when converting text buffer to objects.

2 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/text.c b/source/blender/blenkernel/intern/text.c
index 876547042dc..53b7bb975a3 100644
--- a/source/blender/blenkernel/intern/text.c
+++ b/source/blender/blenkernel/intern/text.c
@@ -942,7 +942,8 @@ char *txt_to_buf (Text *text)
 	if (!text) return NULL;
 	if (!text->curl) return NULL;
 	if (!text->sell) return NULL;
-		
+	if (!text->lines.first) return NULL;
+
 	linef= text->lines.first;
 	charf= 0;
 		
diff --git a/source/blender/src/editfont.c b/source/blender/src/editfont.c
index cb245867c89..a3b05a008c8 100644
--- a/source/blender/src/editfont.c
+++ b/source/blender/src/editfont.c
@@ -354,7 +354,7 @@ void txt_export_to_object(struct Text *text)
 //	char sdir[FILE_MAXDIR];
 //	char sfile[FILE_MAXFILE];
 
-	if(!text) return;
+	if(!text || !text->lines.first) return;
 
 	id = (ID *)text;
 
@@ -429,7 +429,7 @@ void txt_export_to_objects(struct Text *text)
 	int linenum = 0;
 	float offset[3] = {0.0,0.0,0.0};
 
-	if(!text) return;
+	if(!text || !text->lines.first) return;
 
 	id = (ID *)text;