gdb/linespec.c: Fix -Wmaybe-uninitialized warning

Although the bool want_start_sal isn't actually used without being assigned
a value, initialize it to be false in order to prevent the following
-Wmaybe-uninitialized warning:

    linespec.c: In function ‘void minsym_found(linespec_state*, objfile*, minimal_symbol*, std::vector<symtab_and_line>*)’:
    linespec.c:4150:19: warning: ‘want_start_sal’ may be used uninitialized [-Wmaybe-uninitialized]
     4150 |   if (is_function && want_start_sal)

1 files changed, 1 insertions, 1 deletions

diff --git a/gdb/linespec.c b/gdb/linespec.c
index e9339c3..b8c7754 100644
--- a/gdb/linespec.c
+++ b/gdb/linespec.c
@@ -4129,7 +4129,7 @@ minsym_found (struct linespec_state *self, struct objfile *objfile,
 	      struct minimal_symbol *msymbol,
 	      std::vector<symtab_and_line> *result)
 {
-  bool want_start_sal;
+  bool want_start_sal = false;
 
   CORE_ADDR func_addr;
   bool is_function = msymbol_is_function (objfile, msymbol, &func_addr);