remove pointless va_copy to avoid cleanup dance

A va_copy call needs to be closed in all branches with va_end, so these
functions would need to be reworked slightly, but we don't actually need
to copy the va_list as we don't work on it, we just push it forward, so
dropping the copy and everyone is happy.

Reported-By: cppcheck
Gbp-Dch: Ignore

test/interactive-helper/libnoprofile.c

@@ -7,17 +7,14 @@
 #include <stdio.h>
 
 int vprintf(const char *format, va_list ap) {
-	static int (*func_fprintf)(const char *format, va_list ap) = NULL;
-	if (func_fprintf == NULL)
-		func_fprintf = (int (*) (const char *format, va_list ap)) dlsym(RTLD_NEXT, "vprintf");
-
-    va_list ap2;
-    va_copy(ap2, ap);
     if (strncmp(format, "profiling:", strlen("profiling:")) == 0)
         return 0;
-    int res = func_fprintf(format, ap2);
-    va_end(ap2);
-    return res;
+
+    static int (*func_fprintf)(const char *format, va_list ap) = NULL;
+    if (func_fprintf == NULL)
+       func_fprintf = (int (*)(const char *format, va_list ap))dlsym(RTLD_NEXT, "vprintf");
+
+    return func_fprintf(format, ap);
 }
 int printf(const char *format, ...) {
     va_list ap;
@@ -28,17 +25,14 @@ int printf(const char *format, ...) {
 }
 
 int vfprintf(FILE *stream, const char *format, va_list ap) {
-	static int (*func_vfprintf)(FILE *stream, const char *format, va_list ap) = NULL;
-	if (func_vfprintf == NULL)
-		func_vfprintf = (int (*) (FILE *stream, const char *format, va_list ap)) dlsym(RTLD_NEXT, "vfprintf");
-
-    va_list ap2;
-    va_copy(ap2, ap);
     if (strncmp(format, "profiling:", strlen("profiling:")) == 0)
         return 0;
-    int res = func_vfprintf(stream, format, ap2);
-    va_end(ap2);
-    return res;
+
+    static int (*func_vfprintf)(FILE * stream, const char *format, va_list ap) = NULL;
+    if (func_vfprintf == NULL)
+       func_vfprintf = (int (*)(FILE * stream, const char *format, va_list ap))dlsym(RTLD_NEXT, "vfprintf");
+
+    return func_vfprintf(stream, format, ap);
 }
 
 int fprintf(FILE *stream, const char *format, ...) {