ofi: Fix Coverity warnings

Fix two coverity warnings:
  - Uninitialized variables (UNINIT) in /opal/mca/common/ofi/common_ofi.c: 859 in opal_common_ofi_select_provider()
  - Null pointer dereferences (FORWARD_NULL) /opal/mca/common/ofi/common_ofi.c: 636 in is_near()

Move the "near" parameter in opal_common_ofi_select_provider() outside
the #if OPAL_OFI_PCI_DATA_AVAILABLE block, because later in the code
it's being used outside of it.

Signed-off-by: Amir Shehata <shehataa@ornl.gov>

Author: amirshehataornl

opal/mca/common/ofi/common_ofi.c

@@ -651,9 +651,9 @@ static bool is_near(pmix_device_distance_t *distances,
                 ret = sscanf(distances[i].uuid, "fab://%256s::%256s", lnguid, lsguid);
                 if (ret != 2)
                     continue;
-                if (0 == strcasecmp(lnguid, nguid)) {
+                if (nguid && (0 == strcasecmp(lnguid, nguid))) {
                     return true;
-                } else if (0 == strcasecmp(lsguid, sguid)) {
+                } else if (sguid && (0 == strcasecmp(lsguid, sguid))) {
                     return true;
                 }
             }
@@ -789,7 +789,7 @@ struct fi_info *opal_common_ofi_select_provider(struct fi_info *provider_list,
     struct fi_pci_attr pci;
     int num_distances = 0;
 #endif
-    bool near;
+    bool near = false;
     int ret;
     unsigned int num_provider = 0, provider_limit = 0;
     bool provider_found = false;