Silence spurious warning in Verilog lexer when compiling with GCC

The chosen value shouldn't have any effect. I considered something
clearly wrong like -1, but there's no checking inside the generated
lexer, and I suspect this will cause even weirder bugs if triggered
than just setting it to INITIAL.

diff --git a/frontends/verilog/verilog_lexer.l b/frontends/verilog/verilog_lexer.l
index f6a3ac4db8f8ae5df0ae4ca9a90b3284df92ddb3..65a2e9a78e37a25e8c145d71efaef7a3459ac4a0 100644 (file)
--- a/frontends/verilog/verilog_lexer.l
+++ b/frontends/verilog/verilog_lexer.l
@@ -128,7 +128,9 @@ static bool isUserType(std::string &s)
 %x BASED_CONST
 
 %%
-       int comment_caller;
+       // Initialise comment_caller to something to avoid a "maybe undefined"
+       // warning from GCC.
+       int comment_caller = INITIAL;
 
 <INITIAL,SYNOPSYS_TRANSLATE_OFF>"`file_push "[^\n]* {
        fn_stack.push_back(current_filename);