Fix some commonly made spelling errors in comments.

src/cc65/casenode.c

@@ -95,7 +95,7 @@ void FreeCaseNodeColl (Collection* Nodes)
 int SearchCaseNode (const Collection* Nodes, unsigned char Key, int* Index)
 /* Search for a node in the given collection. If the node has been found,
 ** set Index to the index of the node and return true. If the node was not
-** found, set Index the the insertion position of the node and return
+** found, set Index the insertion position of the node and return
 ** false.
 */
 {

src/cc65/casenode.h

@@ -116,7 +116,7 @@ void FreeCaseNodeColl (Collection* Nodes);
 int SearchCaseNode (const Collection* Nodes, unsigned char Key, int* Index);
 /* Search for a node in the given collection. If the node has been found,
 ** set Index to the index of the node and return true. If the node was not
-** found, set Index the the insertion position of the node and return
+** found, set Index to the insertion position of the node and return
 ** false.
 */
 

src/cc65/codegen.c

@@ -1409,7 +1409,7 @@ static unsigned g_intpromotion (unsigned flags)
 unsigned g_typeadjust (unsigned lhs, unsigned rhs)
 /* Adjust the integer operands before doing a binary operation. lhs is a flags
 ** value, that corresponds to the value on TOS, rhs corresponds to the value
-** in (e)ax. The return value is the the flags value for the resulting type.
+** in (e)ax. The return value is the flags value for the resulting type.
 */
 {
     /* Get the type spec from the flags */

src/cc65/codegen.h

@@ -217,7 +217,7 @@ void g_reglong (unsigned Flags);
 unsigned g_typeadjust (unsigned lhs, unsigned rhs);
 /* Adjust the integer operands before doing a binary operation. lhs is a flags
 ** value, that corresponds to the value on TOS, rhs corresponds to the value
-**  in (e)ax. The return value is the the flags value for the resulting type.
+**  in (e)ax. The return value is the flags value for the resulting type.
 */
 
 unsigned g_typecast (unsigned lhs, unsigned rhs);

src/cc65/expr.c

@@ -846,7 +846,7 @@ static unsigned FunctionArgList (FuncDesc* Func, int IsFastcall, ExprDesc* ED)
     /* The function returns the size of all arguments pushed onto the stack.
     ** However, if there are parameters missed (which is an error, and was
     ** flagged by the compiler), AND a stack frame was preallocated above,
-    ** we would loose track of the stackpointer, and generate an internal error
+    ** we would lose track of the stackpointer, and generate an internal error
     ** later. So we correct the value by the parameters that should have been
     ** pushed into, to avoid an internal compiler error. Since an error was
     ** generated before, no code will be output anyway.