patch 9.0.0143: cursor positioned after virtual text in empty line

Problem:    Cursor positioned after virtual text in empty line.
Solution:   Keep cursor in the first column. (closes #10786)

src/charset.c

@@ -1127,7 +1127,7 @@ win_lbr_chartabsize(
     size = win_chartabsize(wp, s, vcol);
 
 # ifdef FEAT_PROP_POPUP
-    if (cts->cts_has_prop_with_text)
+    if (cts->cts_has_prop_with_text && *line != NUL)
     {
 	int	    i;
 	int	    col = (int)(s - line);

src/testdir/dumps/Test_prop_inserts_text_1.dump

@@ -1,6 +1,6 @@
 |i+0&#ffffff0|n|s|e|r|t| |s|o|m|e| |t|e|x|t| |S+0#ffffff16#e000002|O|M|E| |h+0#0000000#ffffff0|e|r|e| |a|n|d| |o|t|h|e|r| |t|e|x|t| |O+0&#ffff4012|T|H|E|R| |t+0&#ffffff0|h|e|r|e| |a|n|d| |s|o
 |m|e| |m|o|r|e| |t|e|x|t| |a|f|t|e|r| |M+0&#5fd7ff255|O|R|E| |w+0&#ffffff0|r|a|p@1|i|n>g| @27
 |p|r|e|s+0&#e0e0e08|ö|m|e|和*&|平|t+&|é|x|t|p+0&#ffffff0|o|s|t| @40
+|e+0#ffffff16#e000002|m|p|t|y| |l|i|n|e| +0#0000000#ffffff0@49
 |~+0#4040ff13&| @58
-|~| @58
 | +0#0000000&@41|1|,|7|6|-|9|2| @6|A|l@1| 

src/testdir/dumps/Test_prop_inserts_text_2.dump

@@ -1,6 +1,6 @@
 | +0#0000e05#a8a8a8255@1|i+0#0000000#ffffff0|n|s|e|r|t| |s|o|m|e| |t|e|x|t| |S+0#ffffff16#e000002|O|M|E| |h+0#0000000#ffffff0|e|r|e| |a|n|d| |o|t|h|e|r| |t|e|x|t| |O+0&#ffff4012|T|H|E|R| |t+0&#ffffff0|h|e|r|e| |a|n|d| 
 | +0#0000e05#a8a8a8255@1|s+0#0000000#ffffff0|o|m|e| |m|o|r|e| |t|e|x|t| |a|f|t|e|r| |M+0&#5fd7ff255|O|R|E| |w+0&#ffffff0|r|a|p@1|i|n>g| @23
 | +0#0000e05#a8a8a8255@1|p+0#0000000#ffffff0|r|e|s+0&#e0e0e08|ö|m|e|和*&|平|t+&|é|x|t|p+0&#ffffff0|o|s|t| @38
+| +0#0000e05#a8a8a8255@1|e+0#ffffff16#e000002|m|p|t|y| |l|i|n|e| +0#0000000#ffffff0@47
 |~+0#4040ff13&| @58
-|~| @58
 | +0#0000000&@41|1|,|7|6|-|9|2| @6|A|l@1| 

src/testdir/dumps/Test_prop_inserts_text_3.dump

@@ -0,0 +1,6 @@
+| +0#0000e05#a8a8a8255@1|i+0#0000000#ffffff0|n|s|e|r|t| |s|o|m|e| |t|e|x|t| |S+0#ffffff16#e000002|O|M|E| |h+0#0000000#ffffff0|e|r|e| |a|n|d| |o|t|h|e|r| |t|e|x|t| |O+0&#ffff4012|T|H|E|R| |t+0&#ffffff0|h|e|r|e| |a|n|d| 
+| +0#0000e05#a8a8a8255@1|s+0#0000000#ffffff0|o|m|e| |m|o|r|e| |t|e|x|t| |a|f|t|e|r| |M+0&#5fd7ff255|O|R|E| |w+0&#ffffff0|r|a|p@1|i|n|g| @23
+| +0#0000e05#a8a8a8255@1|p+0#0000000#ffffff0|r|e|s+0&#e0e0e08|ö|m|e|和*&|平|t+&|é|x|t|p+0&#ffffff0|o|s>t| @38
+| +0#0000e05#a8a8a8255@1|e+0#ffffff16#e000002|m|p|t|y| |l|i|n|e| +0#0000000#ffffff0@47
+|~+0#4040ff13&| @58
+| +0#0000000&@41|2|,|7|-|1|9| @7|A|l@1| 

src/testdir/dumps/Test_prop_inserts_text_4.dump

@@ -0,0 +1,6 @@
+| +0#0000e05#a8a8a8255@1|i+0#0000000#ffffff0|n|s|e|r|t| |s|o|m|e| |t|e|x|t| |S+0#ffffff16#e000002|O|M|E| |h+0#0000000#ffffff0|e|r|e| |a|n|d| |o|t|h|e|r| |t|e|x|t| |O+0&#ffff4012|T|H|E|R| |t+0&#ffffff0|h|e|r|e| |a|n|d| 
+| +0#0000e05#a8a8a8255@1|s+0#0000000#ffffff0|o|m|e| |m|o|r|e| |t|e|x|t| |a|f|t|e|r| |M+0&#5fd7ff255|O|R|E| |w+0&#ffffff0|r|a|p@1|i|n|g| @23
+| +0#0000e05#a8a8a8255@1|p+0#0000000#ffffff0|r|e|s+0&#e0e0e08|ö|m|e|和*&|平|t+&|é|x|t|p+0&#ffffff0|o|s|t| @38
+| +0#0000e05#a8a8a8255@1>e+0#ffffff16#e000002|m|p|t|y| |l|i|n|e| +0#0000000#ffffff0@47
+|~+0#4040ff13&| @58
+| +0#0000000&@41|3|,|0|-|1| @8|A|l@1| 

src/testdir/test_textprop.vim

@@ -2221,6 +2221,9 @@ func Test_prop_inserts_text()
       call setline(2, 'prepost')
       call prop_type_add('multibyte', #{highlight: 'Visual'})
       call prop_add(2, 4, #{type: 'multibyte', text: 'söme和平téxt'})
+
+      call setline(3, '')
+      call prop_add(3, 1, #{type: 'someprop', text: 'empty line'})
   END
   call writefile(lines, 'XscriptPropsWithText')
   let buf = RunVimInTerminal('-S XscriptPropsWithText', #{rows: 6, cols: 60})
@@ -2229,6 +2232,12 @@ func Test_prop_inserts_text()
   call term_sendkeys(buf, ":set signcolumn=yes\<CR>")
   call VerifyScreenDump(buf, 'Test_prop_inserts_text_2', {})
 
+  call term_sendkeys(buf, "2G$")
+  call VerifyScreenDump(buf, 'Test_prop_inserts_text_3', {})
+
+  call term_sendkeys(buf, "3G")
+  call VerifyScreenDump(buf, 'Test_prop_inserts_text_4', {})
+
   call StopVimInTerminal(buf)
   call delete('XscriptPropsWithText')
 endfunc

src/version.c

@@ -735,6 +735,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    143,
 /**/
     142,
 /**/