COMPMID-2432 Fix defects reported by Coverity

Change-Id: I887eea57cc0202ad42b76b0ea093724943116a7e
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1446
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/src/core/ITensor.cpp b/src/core/ITensor.cpp
index 7cf04b5..607f5ce 100644
--- a/src/core/ITensor.cpp
+++ b/src/core/ITensor.cpp
@@ -81,6 +81,8 @@
     const Strides     strides      = this->info()->strides_in_bytes();
     const PaddingSize padding      = this->info()->padding();
     const size_t      num_channels = this->info()->num_channels();
+    std::ios          stream_status(nullptr);
+    stream_status.copyfmt(s);
 
     // Set precision
     if(is_data_type_float(dt) && (io_fmt.precision_type != IOFormatInfo::PrecisionType::Default))
@@ -151,6 +153,9 @@
             s << io_fmt.row_delim;
         }
     }
+
+    // Restore output stream flags
+    s.copyfmt(stream_status);
 }
 #endif /* ARM_COMPUTE_ASSERTS_ENABLED */