tdf#114441 Replace sal_uLong by size_t in doccomp.cxx

GetLineCount() returns size_t, so change the data type for relevant
variables. Also change the max values for preceding and other_preceding,
from ULONG_MAX to SIZE_MAX.

Change-Id: I973ce68808dd77efb7326d4177499d0fe1e5d764
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/208745
Reviewed-by: Hossein <hossein@libreoffice.org>
Tested-by: Jenkins

sw/source/core/doc/doccomp.cxx

@@ -47,6 +47,7 @@
 #include <com/sun/star/frame/XModel3.hpp>
 
 #include <cstddef>
+#include <cstdint>
 #include <memory>
 #include <type_traits>
 #include <vector>
@@ -937,15 +938,15 @@ namespace
 {
     void lcl_ShiftBoundariesOneway( CompareData* const pData, CompareData const * const pOtherData)
     {
-        sal_uLong i = 0;
-        sal_uLong j = 0;
-        sal_uLong i_end = pData->GetLineCount();
-        sal_uLong preceding = ULONG_MAX;
-        sal_uLong other_preceding = ULONG_MAX;
+        size_t i = 0;
+        size_t j = 0;
+        size_t i_end = pData->GetLineCount();
+        size_t preceding = SIZE_MAX;
+        size_t other_preceding = SIZE_MAX;
 
         while (true)
         {
-            sal_uLong start, other_start;
+            size_t start, other_start;
 
             /* Scan forwards to find beginning of another run of changes.
                Also keep track of the corresponding point in the other file.  */