修复低版本gcc编译器告警

sha.c

@@ -668,7 +668,8 @@ char *source_c[] = {
 "    argvs[3] = argv[0];",
 "",
 "    int j=1;",
-"    for(int i=4; i<=argc-1+4; i++)",
+"    int i=4;",
+"    for(i=4; i<=argc-1+4; i++)",
 "    {",
 "        argvs[i] = argv[j];",
 "        j++;",
@@ -712,6 +713,7 @@ int main(int argc, char *argv[])
     char binfile[BUFFER_SIZE];
     char buildcmd[BUFFER_SIZE*10];
     
+    int indx = 0;
     
     
     memset(text_content, 0, file_size * 2);
@@ -762,7 +764,7 @@ int main(int argc, char *argv[])
     fprintf(sfile, "%s\n", encrypted_text);
     fprintf(sfile, "%s\n", encrypted_text_len);
     fflush(sfile);
-    for (int indx = 0; source_c[indx]; indx++)
+    for (indx=0; source_c[indx]; indx++)
         fprintf(sfile, "%s\n", source_c[indx]);
     fclose(sfile);