Minor fix for clang-analyzer

src/rtl_433.c

@@ -68,6 +68,16 @@
 #include "getopt/getopt.h"
 #endif
 
+#if defined(__clang__)
+#define NORETURN _Noreturn
+#elif defined(__GNUC__)
+#define NORETURN __attribute__((noreturn))
+#elif defined(_MSC_VER)
+#define NORETURN __declspec(noreturn)
+#else
+#define NORETURN
+#endif
+
 r_device *flex_create_device(char *spec); // maybe put this in some header file?
 
 static void print_version(void)
@@ -76,6 +86,7 @@ static void print_version(void)
     fprintf(stderr, "Use -h for usage help and see https://triq.org/ for documentation.\n");
 }
 
+NORETURN
 static void usage(int exit_code)
 {
     term_help_printf(
@@ -129,6 +140,7 @@ static void usage(int exit_code)
     exit(exit_code);
 }
 
+NORETURN
 static void help_protocols(r_device *devices, unsigned num_devices, int exit_code)
 {
     unsigned i;
@@ -146,6 +158,7 @@ static void help_protocols(r_device *devices, unsigned num_devices, int exit_cod
     exit(exit_code);
 }
 
+NORETURN
 static void help_device(void)
 {
     term_help_printf(
@@ -171,6 +184,7 @@ static void help_device(void)
     exit(0);
 }
 
+NORETURN
 static void help_gain(void)
 {
     term_help_printf(
@@ -182,6 +196,7 @@ static void help_gain(void)
     exit(0);
 }
 
+NORETURN
 static void help_output(void)
 {
     term_help_printf(
@@ -207,6 +222,7 @@ static void help_output(void)
     exit(0);
 }
 
+NORETURN
 static void help_meta(void)
 {
     term_help_printf(
@@ -231,6 +247,7 @@ static void help_meta(void)
     exit(0);
 }
 
+NORETURN
 static void help_read(void)
 {
     term_help_printf(
@@ -252,6 +269,7 @@ static void help_read(void)
     exit(0);
 }
 
+NORETURN
 static void help_write(void)
 {
     term_help_printf(

src/write_sigrok.c

@@ -207,7 +207,7 @@ void write_sigrok(char const *filename, unsigned samplerate, unsigned probes, un
             perror("unlinking Sigrok \"logic-1-1\" file");
         }
     }
-    for (unsigned i = 0; i < analogs; ++i) {
+    for (unsigned i = 0; i < analogs && argv_analog[i]; ++i) {
         if (unlink(argv_analog[i])) {
             perror("unlinking Sigrok \"analog-1-N-1\" file");
         }