Use "==0" instead of "!strcmp" etc

For the various string-compare routines (strcmp, strcasecmp, str.*cmp)
use "strcmp()==0" instead of "!strcmp()"

Reviewed-by: Tim Hudson <tjh@openssl.org>
diff --git a/crypto/x509v3/v3_conf.c b/crypto/x509v3/v3_conf.c
index bb1146e..672d3de 100644
--- a/crypto/x509v3/v3_conf.c
+++ b/crypto/x509v3/v3_conf.c
@@ -246,10 +246,10 @@
 {
     int gen_type = 0;
     char *p = *value;
-    if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4)) {
+    if ((strlen(p) >= 4) && strncmp(p, "DER:", 4) == 0) {
         p += 4;
         gen_type = 1;
-    } else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5)) {
+    } else if ((strlen(p) >= 5) && strncmp(p, "ASN1:", 5) == 0) {
         p += 5;
         gen_type = 2;
     } else