regcomp.c: silence some compiler warnings

ReREFCNT_inc() returns a value, so cast it to void where not used.

diff --git a/regcomp.c b/regcomp.c
index 2080138..d7a289c 100644 (file)
--- a/regcomp.c
+++ b/regcomp.c
@@ -3871,7 +3871,7 @@ S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
                    SAVEFREESV(RExC_rx_sv);
                    ckWARNreg(RExC_parse,
                              "Quantifier unexpected on zero-length expression");
-                   ReREFCNT_inc(RExC_rx_sv);
+                   (void)ReREFCNT_inc(RExC_rx_sv);
                }
 
                min += minnext * mincount;
@@ -9654,7 +9654,7 @@ S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
                   "%.*s matches null string many times",
                   (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
                   origparse);
-       ReREFCNT_inc(RExC_rx_sv);
+       (void)ReREFCNT_inc(RExC_rx_sv);
     }
 
     if (RExC_parse < RExC_end && *RExC_parse == '?') {
@@ -11574,7 +11574,7 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
            ckWARN3reg(s+2,
                       "POSIX syntax [%c %c] belongs inside character classes",
                       c, c);
-           ReREFCNT_inc(RExC_rx_sv);
+           (void)ReREFCNT_inc(RExC_rx_sv);
            SvREFCNT_inc_simple_void_NN(listsv);
        }
     }
@@ -11843,7 +11843,7 @@ parseit:
                    ckWARN2reg(RExC_parse,
                               "Unrecognized escape \\%c in character class passed through",
                               (int)value);
-                   ReREFCNT_inc(RExC_rx_sv);
+                   (void)ReREFCNT_inc(RExC_rx_sv);
                    SvREFCNT_inc_simple_void_NN(listsv);
                }
                break;
@@ -11894,7 +11894,7 @@ parseit:
                    ckWARN4reg(RExC_parse,
                               "False [] range \"%*.*s\"",
                               w, w, rangebegin);
-                   ReREFCNT_inc(RExC_rx_sv);
+                   (void)ReREFCNT_inc(RExC_rx_sv);
                    SvREFCNT_inc_simple_void_NN(listsv);
                     cp_list = add_cp_to_invlist(cp_list, '-');
                     cp_list = add_cp_to_invlist(cp_list, prevvalue);