Remove those most NOPy of NOPcodes... i=i and friends.

Clang warnings.

src/xpdev/xpprintf.c

@@ -670,7 +670,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 					switch(type) {
 						case XP_PRINTF_TYPE_CHAR:
 						case XP_PRINTF_TYPE_INT:
-							i=i;
 							break;
 						case XP_PRINTF_TYPE_UINT:
 							i=ui;
@@ -713,7 +712,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 					switch(type) {
 						case XP_PRINTF_TYPE_CHAR:
 						case XP_PRINTF_TYPE_INT:
-							i=i;
 							break;
 						case XP_PRINTF_TYPE_UINT:
 							i=ui;
@@ -756,7 +754,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							ui=i;
 							break;
 						case XP_PRINTF_TYPE_UINT:
-							ui=ui;
 							break;
 						case XP_PRINTF_TYPE_LONG:
 							ui=l;
@@ -799,7 +796,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							l=ui;
 							break;
 						case XP_PRINTF_TYPE_LONG:
-							l=l;
 							break;
 						case XP_PRINTF_TYPE_ULONG:
 							l=ul;
@@ -842,7 +838,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							ul=l;
 							break;
 						case XP_PRINTF_TYPE_ULONG:
-							ul=ul;
 							break;
 #if defined(XP_PRINTF_TYPE_LONGLONG)
 						case XP_PRINTF_TYPE_LONGLONG:
@@ -886,7 +881,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							ll=ul;
 							break;
 						case XP_PRINTF_TYPE_LONGLONG:
-							ll=ll;
 							break;
 						case XP_PRINTF_TYPE_ULONGLONG:
 							ll=ull;
@@ -927,7 +921,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							ull=ll;
 							break;
 						case XP_PRINTF_TYPE_ULONGLONG:
-							ull=ull;
 							break;
 						case XP_PRINTF_TYPE_CHARP:
 							ull=strtoull(cp, NULL, 0);
@@ -980,7 +973,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							break;
 #endif
 						case XP_PRINTF_TYPE_CHARP:
-							cp=cp;
 							break;
 						case XP_PRINTF_TYPE_DOUBLE:
 							sprintf(num_str, "%f", d);
@@ -1028,7 +1020,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							d=strtod(cp, NULL);
 							break;
 						case XP_PRINTF_TYPE_DOUBLE:
-							d=d;
 							break;
 						case XP_PRINTF_TYPE_LONGDOUBLE:
 							d=ld;
@@ -1072,7 +1063,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							ld=d;
 							break;
 						case XP_PRINTF_TYPE_LONGDOUBLE:
-							ld=ld;
 							break;
 						case XP_PRINTF_TYPE_VOIDP:
 							ld=(long double)((long int)pntr);
@@ -1116,7 +1106,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							pntr=(void *)(long int)ld;
 							break;
 						case XP_PRINTF_TYPE_VOIDP:
-							pntr=pntr;
 							break;
 						case XP_PRINTF_TYPE_SIZET:
 							pntr=(void *)s;
@@ -1159,7 +1148,6 @@ char *xp_asprintf_next(char *format, int type, ...)
 							s=(size_t)pntr;
 							break;
 						case XP_PRINTF_TYPE_SIZET:
-							s=s;
 							break;
 					}
 					break;