AP_Common: Fix some typos

Fixed some typos found in the code.

libraries/AP_Common/Location.cpp

@@ -485,7 +485,7 @@ int32_t Location::diff_longitude(int32_t lon1, int32_t lon2)
 }
 
 /*
-  limit lattitude to -90e7 to 90e7
+  limit latitude to -90e7 to 90e7
  */
 int32_t Location::limit_lattitude(int32_t lat)
 {

libraries/AP_Common/Location.h

@@ -151,7 +151,7 @@ public:
     // wrap longitude at -180e7 to 180e7
     static int32_t wrap_longitude(int64_t lon);
 
-    // limit lattitude to -90e7 to 90e7
+    // limit latitude to -90e7 to 90e7
     static int32_t limit_lattitude(int32_t lat);
     
     // get lon1-lon2, wrapping at -180e7 to 180e7

libraries/AP_Common/tests/test_location.cpp

@@ -371,7 +371,7 @@ TEST(Location, Line)
 }
 
 /*
-  check if we obey basic euclidian geometry rules of position
+  check if we obey basic euclidean geometry rules of position
   addition/subtraction
  */
 TEST(Location, OffsetError)

libraries/AP_Common/tests/test_nmea_print.cpp

@@ -30,7 +30,7 @@ static DummyUart test_uart;
 
 TEST(NMEA, Printf)
 {
-    // test not enought space
+    // test not enough space
     test_uart.set_txspace(2);
     EXPECT_FALSE(nmea_printf(&test_uart, "TEST"));
     // normal test