installer: fix rendering of <RED>/<A> in paragraphs

Funnily enough, `GetTextWidth()` produces a non-zero width for Line Feed
charaters.

When determining the horizontal offset while rendering the colored text,
we do accumulate in the `RowPrefix` variable all uncolored text, except
Carriage Return characters (which re-set the `RowPrefix` variable to the
empty string).

Crucially, we also include Line Feed characters, Which means that our
rendering is screwed up when using the `<RED>` or `<A>` tag in
everything but the first line of each paragraph.

Let's work around that issue simply by skipping the Line Feed characters
(but only after a Carriage Return, every other instance would not make
sense anyway).

Happily, this does not affect any existing label. But we are about to
introduce a new label that would be affected, so let's fix the bug Right
Now.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

installer/install.iss

@@ -1259,7 +1259,10 @@ begin
             end;
             '<RED>': begin
                 Untagged:=Untagged+SubString(Description,1,i-1);
-                RowPrefix:=RowPrefix+SubString(Description,1,i-1);
+                if (Description[1]=#10) then
+                    RowPrefix:=RowPrefix+SubString(Description,2,i-2)
+                else
+                    RowPrefix:=RowPrefix+SubString(Description,1,i-1);
                 Description:=SubString(Description,i+5,-1);
                 i:=Pos('</RED>',Description);
                 if (i=0) then LogError('Could not find </RED> in '+Description);
@@ -1300,7 +1303,10 @@ begin
             end;
             '<A HREF=': begin
                 Untagged:=Untagged+SubString(Description,1,i-1);
-                RowPrefix:=RowPrefix+SubString(Description,1,i-1);
+                if Description[1]=#10 then
+                    RowPrefix:=RowPrefix+SubString(Description,2,i-2)
+                else
+                    RowPrefix:=RowPrefix+SubString(Description,1,i-1);
                 Description:=SubString(Description,i+8,-1);
                 i:=Pos('>',Description);
                 if (i=0) then LogError('Could not find > in '+Description);