Fix unused variables in qtbase

clang compiler recently got smarter and detects "pseudo used variable"
patterns where we declare a variable and only use it in self-increments,
self-decrements and other similar expressions

Errors:

qtbase/src/corelib/text/qlocale.cpp:3898:9: error: variable 'group_cnt' set but not used [-Werror,-Wunused-but-set-variable]
    int group_cnt = 0; // counts number of group chars
        ^

qtbase/src/corelib/text/qunicodetools.cpp:1372:21: error: variable 'uc' set but not used [-Werror,-Wunused-but-set-variable]
    const char16_t *uc = text + from;
                    ^
and more of the kind

Remove the ones that have no usage, mark others with [[maybe_unused]]

Pick-to: 6.3 6.2
Change-Id: Ib2d0722110e3da8c39e29ec78c0ec290d064c970
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/src/gui/kernel/qplatformcursor.cpp b/src/gui/kernel/qplatformcursor.cpp
index 1330b5bf31..825cb435f8 100644
--- a/src/gui/kernel/qplatformcursor.cpp
+++ b/src/gui/kernel/qplatformcursor.cpp
@@ -619,7 +619,7 @@ void QPlatformCursorImage::set(const uchar *data, const uchar *mask,
     int p = 0;
     int d, m;
 
-    int x = -1, w = 0;
+    int x = -1;
 
     uchar *cursor_data = cursorImage.bits();
     qsizetype bpl = cursorImage.bytesPerLine();
@@ -641,15 +641,11 @@ void QPlatformCursorImage::set(const uchar *data, const uchar *mask,
                     x = j*8+b;
                 else if (x >= 0 && !m) {
                     x = -1;
-                    w = 0;
                 }
-                if (m)
-                    w++;
             }
         }
         if (x >= 0) {
             x = -1;
-            w = 0;
         }
         cursor_data += bpl;
     }