Fix warnings for the wgrib directory (#535)

Co-authored-by: AlysonStahl-NOAA <166434581+AlysonStahl-NOAA@users.noreply.github.com>

Author: manfredsc

wgrib/ec_ext.c

@@ -65,7 +65,7 @@ void EC_ext(unsigned char *pds, char *prefix, char *suffix, int verbose) {
               	   sprintf(string, "Perturbed forecast %d",
                    PDS_EcFcstNo(pds)); 
 		else
-		    strcpy(string, "Perturbed forecasts"); break;
+		    strcpy(string, "Perturbed forecasts");
 		break;
             case 14: strcpy(string, "Cluster means"); break;
             case 15: strcpy(string, "Cluster std. dev."); break;

wgrib/seekgrib.c

@@ -28,10 +28,6 @@
 #include "grib.h"
 #include "pds4.h"
 
-#ifndef min
-   #define min(a,b)  ((a) < (b) ? (a) : (b))
-#endif
-
 /* #define LEN_HEADER_PDS (28+42+100) */
 #define LEN_HEADER_PDS (28+8)