removed unused variables / assigns never used

mrbgems/mruby-sprintf/src/sprintf.c

@@ -1018,7 +1018,7 @@ retry:
             need = width;
 
           CHECK(need + 1);
-          n = snprintf(&buf[blen], need + 1, "%*s", need, "");
+          snprintf(&buf[blen], need + 1, "%*s", need, "");
           if (flags & FMINUS) {
             if (!isnan(fval) && fval < 0.0)
               buf[blen++] = '-';

src/array.c

@@ -294,7 +294,7 @@ mrb_ary_cmp(mrb_state *mrb, mrb_value ary1)
 {
   mrb_value ary2;
   struct RArray *a1, *a2;
-  mrb_value r = mrb_nil_value();
+  mrb_value r;
   mrb_int i, len;
 
   mrb_get_args(mrb, "o", &ary2);

src/class.c

@@ -644,7 +644,6 @@ mrb_get_args(mrb_state *mrb, const char *format, ...)
           *pl = argc-i;
           if (*pl > 0) {
             *var = sp;
-            i = argc;
           }
           i = argc;
           sp += *pl;

src/codegen.c

@@ -1004,7 +1004,6 @@ gen_literal_array(codegen_scope *s, node *tree, int sym, int val)
       tree = tree->cdr;
     }
     if (j > 0) {
-      j = 0;
       ++i;
       if (sym)
         gen_send_intern(s);

src/variable.c

@@ -872,7 +872,7 @@ mrb_vm_const_get(mrb_state *mrb, mrb_sym sym)
 
   if (!c) c = mrb->ci->target_class;
   if (c) {
-    struct RClass *c2 = c;
+    struct RClass *c2;
     mrb_value v;
 
     if (c->iv && iv_get(mrb, c->iv, sym, &v)) {