Wconversion: Fix warnings in cursor_shape.c.

src/nvim/CMakeLists.txt

@@ -42,7 +42,6 @@ list(REMOVE_ITEM NEOVIM_SOURCES ${to_remove})
 set(CONV_SOURCES
   buffer.c
   charset.c
-  cursor_shape.c
   diff.c
   digraph.c
   edit.c

src/nvim/cursor_shape.c

@@ -1,4 +1,5 @@
 #include <assert.h>
+#include <stdint.h>
 #include "nvim/vim.h"
 #include "nvim/ascii.h"
 #include "nvim/cursor_shape.h"
@@ -52,7 +53,6 @@ char_u *parse_shape_opt(int what)
   int all_idx;
   int len;
   int i;
-  long n;
   int found_ve = FALSE;                 /* found "ve" flag */
   int round;
 
@@ -135,7 +135,9 @@ char_u *parse_shape_opt(int what)
               p += len;
               if (!VIM_ISDIGIT(*p))
                 return (char_u *)N_("E548: digit expected");
-              n = getdigits(&p);
+              long digits = getdigits(&p);
+              assert(digits <= INT_MAX);
+              int n = (int)digits;
               if (len == 3) {               /* "ver" or "hor" */
                 if (n == 0)
                   return (char_u *)N_("E549: Illegal percentage");